Bug #1478326: don't allow '/' in distutils.util.get_platform machine names since this value is used to name the build directory.
Bug #1478326: don't allow '/' in distutils.util.get_platform machine names
since this value is used to name the build directory.

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