Rolling v8/build to ceb6a884de26a264870109851fbf5a64577681f6

Rolling v8/tools/clang to 0b50729d487ec853d8f7c762c81cb2ad2785e674

Rolling v8/tools/gyp to e7079f0e0e14108ab0dba58728ff219637458563

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

Review-Url: https://codereview.chromium.org/2144973002
Cr-Commit-Position: refs/heads/master@{#37696}