Update V8 DEPS.
Update V8 DEPS.

Rolling v8/build/gyp to 2a5511bd901f328db10d0b6415c864a5ff59fc81

Rolling v8/tools/clang to 330d3b5bd0ecf77d0d612081ba058ba01adfb67b

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1091453002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27828}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh