This is the initial support for binary operation hints on javascript
binary operators, i.e. JSAdd, JSSubtract and so on. The hints are
extracted from the fullcodegen code object before graph building and the
AstGraphBuilder puts those hints on the operators if available.

R=jarin@chromium.org
BUG=v8:4583
LOG=n

Review URL: https://codereview.chromium.org/1487973002

Cr-Commit-Position: refs/heads/master@{#32443}