Fixed a typo: psrlq -> psrldq.

BUG=XWALK-1823
(cherry picked from commit ca3023fadd35233c6c81b2d6bf48f134dd1fa55f)
Merge pull request #36 from huningxin/crosswalk-6/35.0.1916.114

Crosswalk 6/35.0.1916.114