Fix 45833d9b

The original CL introduced new define V8_ENABLE_ALLOCATION_TIMEOUT
but this change hasn't been ported to GYP. This CL fixed this.

Change-Id: I37f9e958c704f12d5997034f25d216f269cbd25f
Reviewed-on: https://chromium-review.googlesource.com/873913Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50693}