Update D8 generation script for Mac ARM
Update D8 generation script for Mac ARM

Bug: chromium:1282488
Change-Id: I5b35882fc0086e2fddaff01cf3cc502d8b586ff6
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3366370
Reviewed-by: John Chen <334fbfbb4df7c78f091ea1b77c69ca6ac731a3f3@chromium.org>
Commit-Queue: Ryan Heise <50ee0a56d43e9e15503d071e9ceb1a6059353025@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult