Since we naively build the JS source code through concatenation,
we need to ensure the regexp literal does not end up being interpreted
as a multiline comment:

  const re = /*/;

Bug: v8:6741,chromium:808418
Change-Id: Id52fbd2d62c14fc634d05fa1b0192ab86cc9e4fc
Reviewed-on: https://chromium-review.googlesource.com/905667Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51206}