xmmintrin needs to include emmintrin, Darwin system headers seem to depend on it
defining m128[id], at least.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73021 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Headers/xmmintrin.h b/lib/Headers/xmmintrin.h
index 2903049..4938399 100644
--- a/lib/Headers/xmmintrin.h
+++ b/lib/Headers/xmmintrin.h
@@ -898,6 +898,8 @@
   (row3) = _mm_movelh_ps(tmp3, tmp1); \
 } while (0)
 
+#include <emmintrin.h>
+
 #endif /* __SSE__ */
 
 #endif /* __XMMINTRIN_H */