GNUInstallDirs: Keep 'lib' as default LIBDIR on Arch Linux based systems
Arch Linux and derivatives install libraries to /usr/lib
Fixes: #15373 (closed)
Topic-rename: GNUInstallDirs-arch-linux
Arch Linux and derivatives install libraries to /usr/lib
Fixes: #15373 (closed)
Topic-rename: GNUInstallDirs-arch-linux