Rolling v8/tools/clang to e18fbfd9a57db60c8667acfc60f5296337c7f4ab

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

Review-Url: https://codereview.chromium.org/1925193003
Cr-Commit-Position: refs/heads/master@{#35887}