clang-format-diff: Make it work with python3 too

Summary: It is not necessary, but would be nice if the script run on python3 as well (as opposed to only python2, which is going to be deprecated

Contributed by MarcoFalke!

Reviewers: krasimir

Reviewed By: krasimir

Subscribers: lebedev.ri, sammccall, cfe-commits

Differential Revision:

git-svn-id: svn:// 0b72dbe1-c17f-4bc7-b9db-2b4152be0356
1 file changed