With this CL we use the same optimizations for the trap handler ool code
which we already use for trap-if.

* Call a builtin instead of calling the runtime directly.
* Use one call per ool code instead of a source position parameter.
* Do not pass the trap reason as parameter.

R=titzer@chromium.org, eholk@chromium.org

Change-Id: Ieef6da96f340269c3e91efd21ac24e61a42193f4
Reviewed-on: https://chromium-review.googlesource.com/684436Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48168}