For now, both are implemented via a C call, just like i32_rol and
i32_ror. If they turn out to be critical for performance, we can still
implement them via hardware instructions on selected platforms.

R=jkummerow@chromium.org

Bug: v8:9919
Change-Id: I16affdfe397a08ef6a51d310f018b3a099e80e44
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1900454
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64816}