configs/baseline/profiledef.sh: add `-E ztailpacking` to airootfs_image_tool_options for mkfs.erofs

As the man page says, it saves more space, although the feature is experimental.

CHANGELOG.rst

@@ -10,6 +10,7 @@ Added
 
 - Configure the locale for the baseline profile to ``C.UTF-8`` so that a UTF-8 locale is used.
 - Add ``uefi-x64.grub.esp`` and ``uefi-x64.grub.eltorito`` boot mode to support x86_64 UEFI boot on x86_64 machines.
+- Use ``mkfs.erofs``'s ``ztailpacking`` option in the baseline profile to reduce the image size.
 
 Changed
 -------

configs/baseline/profiledef.sh

@@ -14,7 +14,7 @@ bootmodes=('bios.syslinux.mbr' 'bios.syslinux.eltorito'
 arch="x86_64"
 pacman_conf="pacman.conf"
 airootfs_image_type="erofs"
-airootfs_image_tool_options=('-zlz4hc,12')
+airootfs_image_tool_options=('-zlz4hc,12' -E ztailpacking)
 file_permissions=(
   ["/etc/shadow"]="0:0:400"
 )