Polynomial AVX2 on gcc use vex128 vmovq instead of SSE2 movq to avoid stall. BUG=265 TEST=unittest polynomial R=ryanpetrie@google.com
Polynomial AVX2 on gcc use vex128 vmovq instead of SSE2 movq to avoid stall.
BUG=265
TEST=unittest polynomial
R=ryanpetrie@google.com

Review URL: https://webrtc-codereview.appspot.com/2679004

git-svn-id: a51711482b6ba0e1d1ab095578a045eeae45ac9a@816 16f28f9a-4ce2-e073-06de-1de4eb20be90

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