FATAL(...) avoid creating literal strings for line number in release
mode.

Bug: v8:7310
Change-Id: I6a3e329adce36b0efcc240068f6a241d1cca4b6f
Reviewed-on: https://chromium-review.googlesource.com/915066Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51277}