This CL is the first step towards a SetProperty stub, by adding a
stub that redirects to the runtime and replacing every runtime
call-site with a call to this stub.

A followup CL will then add an implementation to the stub similar
to KeyedStoreGenericAssembler::KeyedStoreGeneric().

R=cbruni@chromium.org, jgruber@chromium.org

Change-Id: Iff2f913988cada6220d54817d94d011ad6de2b77
Reviewed-on: https://chromium-review.googlesource.com/1163519
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54926}