R=clemensh@chromium.org
TEST=test-jump-table-assembler/JumpTablePatchingStress
BUG=v8:8018

Change-Id: I1bb4c52a912a7c7ec7fbaf19c79cb7c7dd00a13e
Reviewed-on: https://chromium-review.googlesource.com/1167283
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55016}