This CL removed padding from Abort on ARM, which is no longer needed.

Bug: v8:8054
Change-Id: I7ff0b88ba90e10d15b67b5ae8ca80f2cf7460498
Reviewed-on: https://chromium-review.googlesource.com/1183664
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55356}