Reapply r5364 (Update ARM and NEON optimizations for S32A_Opaque_BlitRow32)

This reverts r5378.

Review URL: https://codereview.appspot.com/6815056

git-svn-id: http://skia.googlecode.com/svn/trunk@6727 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed