Rolling v8/build/gyp to 194ec65a55edf24c1976d4265f57e8c90ef5bb2f

Rolling v8/tools/clang to 790f3b26cdce99c8e5751893a18134afd0202ed0

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/814833012

Cr-Commit-Position: refs/heads/master@{#26087}