Roll vpython to (speculatively) fix tree

Bug: skia:
Change-Id: I7114bf400f868cb3b748506343b4c6b93ecd6fbb
Reviewed-on: https://skia-review.googlesource.com/138934
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
2 files changed