Bump the patch level version of distutils since there were a few bug fixes since the 2.5.0 release.
Bump the patch level version of distutils since there were a few bug fixes
since the 2.5.0 release.

Backport of r54615.

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