osxuniversalgenerator: Fix running as a script
osxuniversalgenerator: Fix running as a script
This is useful when you have to generate a universal prefix from two
arch prefixes.
osxuniversalgenerator: Add some more file types
osxuniversalgenerator: Handle dir links correctly
We were completely ignoring directory symlinks because os.walk doesn't
follow directory symlinks and doesn't list them as files either. We
want to treat them as files because we will simply do the identical
link in the output dir.