... which didn't check writability of array length on appending
a new element to an array.

Bug: chromium:1041251
Change-Id: I6935e505a4844e5b22abe9d4a42786619499daa6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2023551Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66023}