- Implement %TypedArray%prototype.reverse in builtins and
  ElementsAccessor to use std::reverse
- Remove TypedArrayReverse in src/js/typedarray.js
- Fix typo in comments

BUG=v8:5929

Review-Url: https://codereview.chromium.org/2761453002
Cr-Commit-Position: refs/heads/master@{#44132}