Update V8 DEPS.
Update V8 DEPS.

Rolling v8/build/gyp to 5122240c5e5c4d8da12c543d82b03d6089eb77c5

Rolling v8/third_party/icu to 00af1a4e512477e48ba3d5efc97adbc95462685e

Rolling v8/tools/clang to d2b4eddd701ff0265124147bcb0a65f32273f06b

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1192743002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29131}

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