Change clang_format path in angle. Bug: chromium:1447924 Change-Id: I148f8861d1fdc47c25aaad659aa2effe1f1e0af4 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4567824 Reviewed-by: Roman Lavrov <romanl@google.com> Commit-Queue: Roman Lavrov <romanl@google.com> Commit-Queue: Joanna Wang <jojwang@chromium.org>