(#7911) Added a lib_configs section to installer

This will make sure that all files in the source lib directory
make it into the ruby sitelib directory

Because the glob is now lib/**/*, instead of the various
globs with specific extensions (ie. lib/**/*.rb), directories
are now included in the glob list.  This caused an error in
do_libs because File.install would be called on a directory
resulting in a 0 byte file being placed where a directory should
have been.  The error is genereated on the second pass of the loop
when File.makedirs is called, and the file exists and is NOT a
directory