This makes sure debug code in WasmCode traps immediately instead of
embedding a call to the Abort builtin, which would be Isolate specific.

R=clemensh@chromium.org
BUG=v8:7424

Change-Id: I08799d41b5e8d21b9f7af97d65f80a1594d9a613
Reviewed-on: https://chromium-review.googlesource.com/1095113
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53667}