Fix broken test in test_hotshot.  Treating the current directory as an empty file is sloppy and non-portable.  Use NamedTemporaryFile to make an empty file.
Fix broken test in test_hotshot.  Treating the current directory as an
empty file is sloppy and non-portable.  Use NamedTemporaryFile to make
an empty file.

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