fix this testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21340 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/TableGen/TemplateArgRename.td b/test/TableGen/TemplateArgRename.td
index b15f21b..b940a56 100644
--- a/test/TableGen/TemplateArgRename.td
+++ b/test/TableGen/TemplateArgRename.td
@@ -1,6 +1,7 @@
 // tblgen %s
 
 // Make sure there is no collision between XX and XX.
+def S;
 
 class Before<int XX>;
 class After : Before<4> {