Add test_pep277 to the expected skips on Linux.  (This test seems to be skipped everywhere except on Windows NT and descendants, but I'm only going to add it to the skip list for the platform I can test.)
Add test_pep277 to the expected skips on Linux.  (This test seems to
be skipped everywhere except on Windows NT and descendants, but I'm
only going to add it to the skip list for the platform I can test.)

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