deps: backport 3a9bfec from v8 upstream

Some of the logic from `zone.cc` is found in `zone-inl.h` in this
release stream.

Original commit message:

  Fix overflow issue in Zone::New

  When requesting a large allocation near the end of the address space,
  the computation could overflow and erroneously *not* grow the Zone
  as required.

	BUG=chromium:606115
	LOG=y

  Review-Url: https://codereview.chromium.org/1930873002
  Cr-Commit-Position: refs/heads/master@{#35903}

PR-URL: https://github.com/nodejs/node-private/pull/43


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rod Vagg <rod@vagg.org>