Add assembly.h for use in .S files.

llvm-svn: 85263
diff --git a/compiler-rt/lib/arm/unordsf2vfp.S b/compiler-rt/lib/arm/unordsf2vfp.S
index 6b69080..852d4eb 100644
--- a/compiler-rt/lib/arm/unordsf2vfp.S
+++ b/compiler-rt/lib/arm/unordsf2vfp.S
@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "../assembly.h"
 
 //
 // extern int __unordsf2vfp(float a, float b);