Log Message:
Import py27-macholib-1.6 as devel/py-macholib.

macholib can be used to analyze and edit Mach-O headers, the executable format
used by Mac OS X.

It's typically used as a dependency analysis tool, and also to rewrite dylib
references in Mach-O headers to be @executable_path relative.

Though this tool targets a platform specific file format, it is pure python code
that is platform and endian independent.