Rolling v8/tools/clang to a00149535c011c08b6e8cc583a1f10f38d3cdaf9

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

Review URL: https://codereview.chromium.org/1817713002

Cr-Commit-Position: refs/heads/master@{#34911}