Fix nacl-atomic-fence-all test to have alignment specified in load.

Helps make it work with p2i instead of lc2i. This affected the
address mode optimizations, so some of the test expectations
have changed.

BUG=none
(happened to notice it while trying to test some things manually)

R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/671443003
1 file changed