X86 SSE Intrinsics: update header for sqrt_ss, rsqrt_ss and rcp_ss.

There intrinsics pass through the upper FP values from the input.
rdar://12558838


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166743 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed