The stack check builtin really has stub linkage, not wasm linkage. For
the stack check, it technically does not make a difference currently
since the stack check does not receive any arguments.

R=mstarzinger@chromium.org

Change-Id: Ia3e6ea192250dc3799c7a5166cf616f883c1f63f
Reviewed-on: https://chromium-review.googlesource.com/1107709Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53883}