Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/53fa255..be72997

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/7208715..11a6764

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/21d33b1..4b5a724

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/9f0284f..723b259

Rolling v8/tools/swarming_client: https://chromium.googlesource.com/infra/luci/client-py/+log/5da404c..6fd3c7b

This also ports a fix for gyp from:
https://chromium-review.googlesource.com/c/chromium/src/+/752143

TBR=sergiyb@chromium.org

Change-Id: I2f6d183094b1d4dd398cc38ca2dfe1df83b38f4b
Reviewed-on: https://chromium-review.googlesource.com/753587Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49157}