Rolling v8/build/gyp to 70ee80e82bacf2d7816a56f792bb33587b04c338

Rolling v8/tools/clang to 247bb6833987bc73051243230a1f3c949a9c9b92

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

Review URL: https://codereview.chromium.org/1509093002

Cr-Commit-Position: refs/heads/master@{#32672}