Reverted r138652, valgrind doesn't understand obj:*/tblgen.

llvm-svn: 138703
diff --git a/llvm/test/TableGen/nested-comment.td b/llvm/test/TableGen/nested-comment.td
index 68e2958..9831357 100644
--- a/llvm/test/TableGen/nested-comment.td
+++ b/llvm/test/TableGen/nested-comment.td
@@ -1,4 +1,5 @@
 // RUN: tblgen < %s
+// XFAIL: vg_leak
 
 /* foo