FileCheckize some tests.

llvm-svn: 189060
diff --git a/llvm/test/TableGen/strconcat.td b/llvm/test/TableGen/strconcat.td
index 0173c49..dfb1a94 100644
--- a/llvm/test/TableGen/strconcat.td
+++ b/llvm/test/TableGen/strconcat.td
@@ -1,4 +1,6 @@
-// RUN: llvm-tblgen %s | grep fufoo
+// RUN: llvm-tblgen %s | FileCheck %s
+
+// CHECK: fufoo
 
 class Y<string S> {
   string T = !strconcat(S, "foo");