This allows us to consume the type hints gathered by the CompareIC for
the abstract equality and inequality operators. We need to distinguish
Number and NumberOrOddball feedback now, as abstract equality doesn't
truncate null and undefined to Number.

R=epertoso@chromium.org
BUG=v8:4583

Review-Url: https://codereview.chromium.org/2222983002
Cr-Commit-Position: refs/heads/master@{#38432}