__sincosf_stret returns sinf / cosf in bits 0:31 and 32:63 of xmm0, not in
xmm0 / xmm1.

rdar://13599493


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179141 91177308-0d34-0410-b5e6-96231b3b80d8