Fix multilib -devel installs
    
    This time the issue was that the glib build system generates
    bytecompiled python files during make install, so the 'touch -r' that's
    after make install didn't take effect. Fix this by removing the
    bytecompiled files after make install, and let rpmbuild brp scripts
    regenerate them again afterwards.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1634778