Fix x86 compilation of const-wide.
Fix x86 compilation of const-wide.

The psllq op was missing a prefix of 0x66, and it ended up shifting an
mm register instead of the intended xmm register. Now IntMath works.

Change-Id: Ie5244d77bced338f1d34c7079e19ff68cff7952a

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst