port 55b4df73(r34303)

  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.

BUG=

Review URL: https://codereview.chromium.org/1743123002

Cr-Commit-Position: refs/heads/master@{#34352}