deps: backport dd310b4341 from upstream V8

Original commit message:

[crankshaft] Fix string addition to check for max length of cons string.

BUG=chromium:678917

Review-Url: https://codereview.chromium.org/2653623002
Cr-Commit-Position: refs/heads/master@{#42621}

Fixes: #12573 (closed)

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

Affected core subsystem(s)

deps