This means we only have to maintain the arch list in one place.

Bug: v8:11420, v8:11421
Change-Id: I1618e2ab1396ad85aca60923111e5966e547e65a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3041420
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Patrick Thier <pthier@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75813}