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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141294 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/TableGen/MultiClassDefName.td b/test/TableGen/MultiClassDefName.td
index 138c93d..296e30c 100644
--- a/test/TableGen/MultiClassDefName.td
+++ b/test/TableGen/MultiClassDefName.td
@@ -1,4 +1,4 @@
-// RUN: tblgen %s | grep WorldHelloCC | count 1
+// RUN: llvm-tblgen %s | grep WorldHelloCC | count 1
 // XFAIL: vg_leak
 
 class C<string n> {