The parser now throws for literals that are too big for the runtime
to support, thus avoiding CHECK-failures further down the line.

Tbr: rmcilroy@chromium.org
Bug: v8:6791
Change-Id: Ie45ddebb8aa9e7a30e8b6b74f99916b700e38e4a
Reviewed-on: https://chromium-review.googlesource.com/747682
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49059}