[avx] Add patterns for combining vextractf128 + vmovaps/vmovups/vmobdqu to

vextractf128 with 128-bit mem dest.

Combines

	vextractf128 $0, %ymm0, %xmm0
	vmovaps %xmm0, (%rdi)

to

    vextractf128 $0, %ymm0, (%rdi)

rdar://11082570

llvm-svn: 153139