Add assembly.h for use in .S files.

llvm-svn: 85263
diff --git a/compiler-rt/lib/arm/fixsfsivfp.S b/compiler-rt/lib/arm/fixsfsivfp.S
index cd2fbe8..d480390 100644
--- a/compiler-rt/lib/arm/fixsfsivfp.S
+++ b/compiler-rt/lib/arm/fixsfsivfp.S
@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "../assembly.h"
 
 //
 // extern int __fixsfsivfp(float a);