Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/8235ac1..e9f3127

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Change-Id: Icedf6fe686afb85953492e395446e06dd7bc62db
Reviewed-on: https://chromium-review.googlesource.com/472349Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44504}