Adding RUN lines.

llvm-svn: 17527
diff --git a/llvm/test/Regression/CodeGen/CBackend/2004-08-09-va-end-null.ll b/llvm/test/Regression/CodeGen/CBackend/2004-08-09-va-end-null.ll
index 7828de3..f15fa86 100644
--- a/llvm/test/Regression/CodeGen/CBackend/2004-08-09-va-end-null.ll
+++ b/llvm/test/Regression/CodeGen/CBackend/2004-08-09-va-end-null.ll
@@ -1,3 +1,5 @@
+; RUN: llvm-as < %s | llc -march=c
+
 declare void %llvm.va_end(sbyte*)
 
 void %test() {