Rolling v8/tools/clang to b2ed9e4af62108938543234380912eeb9d5a58e6

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

Review URL: https://codereview.chromium.org/1491363003

Cr-Commit-Position: refs/heads/master@{#32542}