This patch adds the reverse method to TypedArrays, together with a
test. The test also runs for normal Arrays, since I didn't see a
test for reversing dense arrays.

BUG=v8:3578
LOG=Y
R=arv@chromium.org

Review URL: https://codereview.chromium.org/1132723008

Patch from Daniel Ehrenberg <dehrenberg@chromium.org>.

Cr-Commit-Position: refs/heads/master@{#28493}