Provide `wx-config-base` in wxwidgets-common
# Description:
Currently `wx-config*` scripts are only provided in wxwidgets-gtk3 and wxwidgets-qt5 packages. wxwidgets also can be used for cli applications. https://docs.wxwidgets.org/3.2.8/page_libs.html#page_libs_wxbase
wxwidgets-common already provides `libwx_base*` libraries.
Nothing in main repos depends only it as of now and all applications so far are gtk3.
However there is `amule-daemon` aur package, which only requires these wxbase libs.
# Additional info:
* package version: 3.2.8-2
* config and/or log files: N/A
* link to upstream bug report, if any: N/A
issue