This switches from copying entire runtime stubs into each module to only
having small jump table slots in each module that act as a trampoline to
the actual embedded builtin representing the runtime stub. This reduces
the memory footprint of modules.

R=clemensh@chromium.org

Change-Id: I3de528f7ebcc104f114ec32914d2b86e810d10d6
Reviewed-on: https://chromium-review.googlesource.com/c/1460474
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59575}