presubmit: print the commit being formatted in git-clang-format.py

BUG=None
TEST=Manual

Change-Id: I126cada4dee2c698fa2d493cc2b69d606e82d696
Reviewed-on: https://chromium-review.googlesource.com/457376
Commit-Ready: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Wu-cheng Li <wuchengli@chromium.org>
1 file changed