This makes sure we leave some gap on the stack whenever compilation jobs
are being finalized. Such a finalization can trigger assembling back on
the main thread, hence requiring a non-negligible amount of stack. This
is in sync with other {Runtime_CompileFoo} methods.

R=ishell@chromium.org
BUG=chromium:740400,chromium:741599

Change-Id: I96fbd524c3cd443a1f5a8e22925b92407fadfb63
Reviewed-on: https://chromium-review.googlesource.com/568142Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46595}