Rolling v8/base/trace_event/common to 6232c13e4edb36c84c61653fdae5a4afb5af9745

Rolling v8/build to 8438b8f51c0b125b298ad497c1bc1aa016c908ae

Rolling v8/buildtools to 57649e5e2001ba1f5e5d45f5a838c616ea0e9cb9

Rolling v8/tools/clang to c1f39cb405e8af68a20e08e9485275a42260a88f

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

Review-Url: https://codereview.chromium.org/2353363007
Cr-Commit-Position: refs/heads/master@{#39611}