Rolling v8/build/gyp to 8e8c3178d9d2734a6223b87fbd45ab250baf77e8

Rolling v8/tools/clang to c789a99803595dfa963ba300ac79b760d1304d8c

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

Review URL: https://codereview.chromium.org/1834583002

Cr-Commit-Position: refs/heads/master@{#35050}