Draft: wlroots0.17: install files regularily

With wlroots 0.18 upstream made the whole package versioned. This allows to have multiple versions of wlroots installed without moving the files into non-standard subfolders. As a benefit this indirectly makes the move of the wlroots 0.17 files unnecessary, as there is no file left which could cause a conflict.

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The upstream change in question: https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/4b4f76cc13574544216b59b3a9902b468b82108b
Adding this MR would naturally cause a rebuild of all related packages that need wlroots0.17 because the PKG_CONFIG_PATH='/usr/lib/wlroots0.17/pkgconfig needs to be dropped. Therefore I made this MR a draft, as I want to gauge if this change would be accepted.
Build the package locally with the change applied and it coexists with the regular wlroots package.

$ pacman -Ql wlroots0.17 wlroots
wlroots0.17 /usr/
wlroots0.17 /usr/include/
wlroots0.17 /usr/include/wlr/
wlroots0.17 /usr/include/wlr/backend.h
wlroots0.17 /usr/include/wlr/backend/
wlroots0.17 /usr/include/wlr/backend/drm.h
wlroots0.17 /usr/include/wlr/backend/headless.h
wlroots0.17 /usr/include/wlr/backend/interface.h
wlroots0.17 /usr/include/wlr/backend/libinput.h
wlroots0.17 /usr/include/wlr/backend/multi.h
wlroots0.17 /usr/include/wlr/backend/session.h
wlroots0.17 /usr/include/wlr/backend/wayland.h
wlroots0.17 /usr/include/wlr/backend/x11.h
wlroots0.17 /usr/include/wlr/config.h
wlroots0.17 /usr/include/wlr/interfaces/
wlroots0.17 /usr/include/wlr/interfaces/wlr_buffer.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_keyboard.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_output.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_pointer.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_switch.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_tablet_pad.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_tablet_tool.h
wlroots0.17 /usr/include/wlr/interfaces/wlr_touch.h
wlroots0.17 /usr/include/wlr/render/
wlroots0.17 /usr/include/wlr/render/allocator.h
wlroots0.17 /usr/include/wlr/render/dmabuf.h
wlroots0.17 /usr/include/wlr/render/drm_format_set.h
wlroots0.17 /usr/include/wlr/render/egl.h
wlroots0.17 /usr/include/wlr/render/gles2.h
wlroots0.17 /usr/include/wlr/render/interface.h
wlroots0.17 /usr/include/wlr/render/pass.h
wlroots0.17 /usr/include/wlr/render/pixman.h
wlroots0.17 /usr/include/wlr/render/swapchain.h
wlroots0.17 /usr/include/wlr/render/vulkan.h
wlroots0.17 /usr/include/wlr/render/wlr_renderer.h
wlroots0.17 /usr/include/wlr/render/wlr_texture.h
wlroots0.17 /usr/include/wlr/types/
wlroots0.17 /usr/include/wlr/types/wlr_buffer.h
wlroots0.17 /usr/include/wlr/types/wlr_compositor.h
wlroots0.17 /usr/include/wlr/types/wlr_content_type_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_cursor.h
wlroots0.17 /usr/include/wlr/types/wlr_cursor_shape_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_damage_ring.h
wlroots0.17 /usr/include/wlr/types/wlr_data_control_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_data_device.h
wlroots0.17 /usr/include/wlr/types/wlr_drm.h
wlroots0.17 /usr/include/wlr/types/wlr_drm_lease_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_export_dmabuf_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_foreign_toplevel_management_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_fractional_scale_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_fullscreen_shell_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_gamma_control_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_idle_inhibit_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_idle_notify_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_input_device.h
wlroots0.17 /usr/include/wlr/types/wlr_input_inhibitor.h
wlroots0.17 /usr/include/wlr/types/wlr_input_method_v2.h
wlroots0.17 /usr/include/wlr/types/wlr_keyboard.h
wlroots0.17 /usr/include/wlr/types/wlr_keyboard_group.h
wlroots0.17 /usr/include/wlr/types/wlr_keyboard_shortcuts_inhibit_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_layer_shell_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_linux_dmabuf_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_matrix.h
wlroots0.17 /usr/include/wlr/types/wlr_output.h
wlroots0.17 /usr/include/wlr/types/wlr_output_layer.h
wlroots0.17 /usr/include/wlr/types/wlr_output_layout.h
wlroots0.17 /usr/include/wlr/types/wlr_output_management_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_output_power_management_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_pointer.h
wlroots0.17 /usr/include/wlr/types/wlr_pointer_constraints_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_pointer_gestures_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_presentation_time.h
wlroots0.17 /usr/include/wlr/types/wlr_primary_selection.h
wlroots0.17 /usr/include/wlr/types/wlr_primary_selection_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_region.h
wlroots0.17 /usr/include/wlr/types/wlr_relative_pointer_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_scene.h
wlroots0.17 /usr/include/wlr/types/wlr_screencopy_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_seat.h
wlroots0.17 /usr/include/wlr/types/wlr_security_context_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_server_decoration.h
wlroots0.17 /usr/include/wlr/types/wlr_session_lock_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_shm.h
wlroots0.17 /usr/include/wlr/types/wlr_single_pixel_buffer_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_subcompositor.h
wlroots0.17 /usr/include/wlr/types/wlr_switch.h
wlroots0.17 /usr/include/wlr/types/wlr_tablet_pad.h
wlroots0.17 /usr/include/wlr/types/wlr_tablet_tool.h
wlroots0.17 /usr/include/wlr/types/wlr_tablet_v2.h
wlroots0.17 /usr/include/wlr/types/wlr_tearing_control_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_text_input_v3.h
wlroots0.17 /usr/include/wlr/types/wlr_touch.h
wlroots0.17 /usr/include/wlr/types/wlr_viewporter.h
wlroots0.17 /usr/include/wlr/types/wlr_virtual_keyboard_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_virtual_pointer_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_xcursor_manager.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_activation_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_decoration_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_foreign_registry.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_foreign_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_foreign_v2.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_output_v1.h
wlroots0.17 /usr/include/wlr/types/wlr_xdg_shell.h
wlroots0.17 /usr/include/wlr/util/
wlroots0.17 /usr/include/wlr/util/addon.h
wlroots0.17 /usr/include/wlr/util/box.h
wlroots0.17 /usr/include/wlr/util/edges.h
wlroots0.17 /usr/include/wlr/util/log.h
wlroots0.17 /usr/include/wlr/util/region.h
wlroots0.17 /usr/include/wlr/version.h
wlroots0.17 /usr/include/wlr/xcursor.h
wlroots0.17 /usr/include/wlr/xwayland.h
wlroots0.17 /usr/include/wlr/xwayland/
wlroots0.17 /usr/include/wlr/xwayland/server.h
wlroots0.17 /usr/include/wlr/xwayland/shell.h
wlroots0.17 /usr/include/wlr/xwayland/xwayland.h
wlroots0.17 /usr/lib/
wlroots0.17 /usr/lib/libwlroots.so
wlroots0.17 /usr/lib/libwlroots.so.12
wlroots0.17 /usr/lib/pkgconfig/
wlroots0.17 /usr/lib/pkgconfig/wlroots.pc
wlroots0.17 /usr/share/
wlroots0.17 /usr/share/licenses/
wlroots0.17 /usr/share/licenses/wlroots0.17/
wlroots0.17 /usr/share/licenses/wlroots0.17/LICENSE
wlroots /usr/
wlroots /usr/include/
wlroots /usr/include/wlroots-0.18/
wlroots /usr/include/wlroots-0.18/wlr/
wlroots /usr/include/wlroots-0.18/wlr/backend.h
wlroots /usr/include/wlroots-0.18/wlr/backend/
wlroots /usr/include/wlroots-0.18/wlr/backend/drm.h
wlroots /usr/include/wlroots-0.18/wlr/backend/headless.h
wlroots /usr/include/wlroots-0.18/wlr/backend/interface.h
wlroots /usr/include/wlroots-0.18/wlr/backend/libinput.h
wlroots /usr/include/wlroots-0.18/wlr/backend/multi.h
wlroots /usr/include/wlroots-0.18/wlr/backend/session.h
wlroots /usr/include/wlroots-0.18/wlr/backend/wayland.h
wlroots /usr/include/wlroots-0.18/wlr/backend/x11.h
wlroots /usr/include/wlroots-0.18/wlr/config.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_buffer.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_keyboard.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_output.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_pointer.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_switch.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_tablet_pad.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_tablet_tool.h
wlroots /usr/include/wlroots-0.18/wlr/interfaces/wlr_touch.h
wlroots /usr/include/wlroots-0.18/wlr/render/
wlroots /usr/include/wlroots-0.18/wlr/render/allocator.h
wlroots /usr/include/wlroots-0.18/wlr/render/color.h
wlroots /usr/include/wlroots-0.18/wlr/render/dmabuf.h
wlroots /usr/include/wlroots-0.18/wlr/render/drm_format_set.h
wlroots /usr/include/wlroots-0.18/wlr/render/drm_syncobj.h
wlroots /usr/include/wlroots-0.18/wlr/render/egl.h
wlroots /usr/include/wlroots-0.18/wlr/render/gles2.h
wlroots /usr/include/wlroots-0.18/wlr/render/interface.h
wlroots /usr/include/wlroots-0.18/wlr/render/pass.h
wlroots /usr/include/wlroots-0.18/wlr/render/pixman.h
wlroots /usr/include/wlroots-0.18/wlr/render/swapchain.h
wlroots /usr/include/wlroots-0.18/wlr/render/vulkan.h
wlroots /usr/include/wlroots-0.18/wlr/render/wlr_renderer.h
wlroots /usr/include/wlroots-0.18/wlr/render/wlr_texture.h
wlroots /usr/include/wlroots-0.18/wlr/types/
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_alpha_modifier_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_buffer.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_compositor.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_content_type_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_cursor.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_cursor_shape_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_damage_ring.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_data_control_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_data_device.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_drm.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_drm_lease_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_export_dmabuf_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_ext_foreign_toplevel_list_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_foreign_toplevel_management_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_fractional_scale_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_fullscreen_shell_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_gamma_control_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_idle_inhibit_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_idle_notify_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_input_device.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_input_method_v2.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_keyboard.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_keyboard_group.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_keyboard_shortcuts_inhibit_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_layer_shell_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_linux_dmabuf_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_linux_drm_syncobj_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_matrix.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output_layer.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output_layout.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output_management_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output_power_management_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_output_swapchain_manager.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_pointer.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_pointer_constraints_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_pointer_gestures_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_presentation_time.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_primary_selection.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_primary_selection_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_region.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_relative_pointer_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_scene.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_screencopy_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_seat.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_security_context_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_server_decoration.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_session_lock_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_shm.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_single_pixel_buffer_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_subcompositor.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_switch.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_tablet_pad.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_tablet_tool.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_tablet_v2.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_tearing_control_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_text_input_v3.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_touch.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_transient_seat_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_viewporter.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_virtual_keyboard_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_virtual_pointer_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xcursor_manager.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_activation_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_decoration_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_foreign_registry.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_foreign_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_foreign_v2.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_output_v1.h
wlroots /usr/include/wlroots-0.18/wlr/types/wlr_xdg_shell.h
wlroots /usr/include/wlroots-0.18/wlr/util/
wlroots /usr/include/wlroots-0.18/wlr/util/addon.h
wlroots /usr/include/wlroots-0.18/wlr/util/box.h
wlroots /usr/include/wlroots-0.18/wlr/util/edges.h
wlroots /usr/include/wlroots-0.18/wlr/util/log.h
wlroots /usr/include/wlroots-0.18/wlr/util/region.h
wlroots /usr/include/wlroots-0.18/wlr/util/transform.h
wlroots /usr/include/wlroots-0.18/wlr/version.h
wlroots /usr/include/wlroots-0.18/wlr/xcursor.h
wlroots /usr/include/wlroots-0.18/wlr/xwayland.h
wlroots /usr/include/wlroots-0.18/wlr/xwayland/
wlroots /usr/include/wlroots-0.18/wlr/xwayland/server.h
wlroots /usr/include/wlroots-0.18/wlr/xwayland/shell.h
wlroots /usr/include/wlroots-0.18/wlr/xwayland/xwayland.h
wlroots /usr/lib/
wlroots /usr/lib/libwlroots-0.18.so
wlroots /usr/lib/pkgconfig/
wlroots /usr/lib/pkgconfig/wlroots-0.18.pc
wlroots /usr/share/
wlroots /usr/share/licenses/
wlroots /usr/share/licenses/wlroots/
wlroots /usr/share/licenses/wlroots/LICENSE