Rolling v8/build/gyp to 2c1e6cced23554ce84806e570acea637f6473afc

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

Review URL: https://codereview.chromium.org/1413923012

Cr-Commit-Position: refs/heads/master@{#31768}