deps: cherry-pick 6cb999b97b from V8 upstream

[addaleax]

“This will not be merged to 5.9.” → I’m opening this cherry-pick.

Original commit message:

Properly handle loads from global interceptor via prototype chain. ... when receiver is in dictionary mode. Bug: v8:6490 Change-Id: Ic5a8d214adcc4efd4cb163cbc6b351c4e6b596af Reviewed-on: https://chromium-review.googlesource.com/559548 Reviewed-by: Camillo Bruni <[email protected]> Commit-Queue: Igor Sheludko <[email protected]> Cr-Commit-Position: refs/heads/master@{#46428} 

Ref: https://chromium.googlesource.com/v8/v8.git/+/6cb999b97b7953ebfd4aabf2e1f62bf405f21c69
Fixes: #13804

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/v8

[addaleax]

CI: https://ci.nodejs.org/job/node-test-commit/11073/
V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/777/

/cc @targos

[addaleax]

Let’s try that again:

CI: https://ci.nodejs.org/job/node-test-commit/11111/
V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/785/

[targos]

V8 CI is broken. I opened #14219 to fix it

[addaleax]

@targos Thank you!

V8 CI, new try: https://ci.nodejs.org/job/node-test-commit-v8-linux/786/

[jasnell]

rubber-stampy LGTM

[addaleax]

Landed in 785a9e5

[MylesBorins]

Should this be backported to v6.x-staging? If yes please follow the guide and raise a backport PR, if not let me know or add the dont-land-on label.