Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68466 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Headers/emmintrin.h b/lib/Headers/emmintrin.h
index 049e19c..84ce06a 100644
--- a/lib/Headers/emmintrin.h
+++ b/lib/Headers/emmintrin.h
@@ -683,7 +683,7 @@
 }
 
 static inline __m128i __attribute__((__always_inline__, __nodebug__))
-_mm_sad_epu(__m128i a, __m128i b)
+_mm_sad_epu8(__m128i a, __m128i b)
 {
   return __builtin_ia32_psadbw128((__v16qi)a, (__v16qi)b);
 }