Issue #14669: Skip multiprocessing connection pickling test on MacOSX
Issue #14669: Skip multiprocessing connection pickling test on MacOSX

Passing of fds is unreliable on MacOSX, compare issues #6560 and #12958.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator