Adding RUN lines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17532 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CFrontend/2003-11-01-GlobalUnionInit.c b/test/CFrontend/2003-11-01-GlobalUnionInit.c
index 83ee8c0..be7788d 100644
--- a/test/CFrontend/2003-11-01-GlobalUnionInit.c
+++ b/test/CFrontend/2003-11-01-GlobalUnionInit.c
@@ -1,3 +1,5 @@
+// RUN: %llvmgcc -S %s -o - | llvm-as -f -o /dev/null
+
 union bdflush_param {
     struct { int x; } b_un;
     int y[1];