s/tblgen/llvm-tblgen/g in a few missed places, including the tests

llvm-svn: 141294
diff --git a/llvm/test/TableGen/nested-comment.td b/llvm/test/TableGen/nested-comment.td
index 9831357..bf030e7 100644
--- a/llvm/test/TableGen/nested-comment.td
+++ b/llvm/test/TableGen/nested-comment.td
@@ -1,4 +1,4 @@
-// RUN: tblgen < %s
+// RUN: llvm-tblgen < %s
 // XFAIL: vg_leak
 
 /* foo