This allows handler tables to be followed by (at maximum) 4 bytes of
alignment padding. Data following the handler table (e.g. the constant
pool) might cause such padding to be added.

R=jgruber@chromium.org

Change-Id: Icb1d3156032b847dc805b8e3e63b02c0b29dbd51
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1605723Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61437}