Port 55b4df73

Original commit message:
    Only use one set of %StrictEquals/%StrictNotEquals and
    %Equals/%NotEquals runtime entries for both the interpreter
    and the old-style CompareICStub. The long-term plan is to
    update the CompareICStub to also return boolean values, and
    even allow some more code sharing with the interpreter there.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1737853002

Cr-Commit-Position: refs/heads/master@{#34306}