Rolling v8/tools/clang to c09d5840c4a88def889a3e66fe7f1a71655fa06d

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

Review URL: https://codereview.chromium.org/1632793005

Cr-Commit-Position: refs/heads/master@{#33502}