Fixed SelectionDAGBuilder.h C++ filetype declaration to use the canonical C++ instead of c++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index ef73c00..82ac0ed 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -1,4 +1,4 @@
-//===-- SelectionDAGBuilder.h - Selection-DAG building --------*- c++ -*---===//
+//===-- SelectionDAGBuilder.h - Selection-DAG building --------*- C++ -*---===//
 //
 //                     The LLVM Compiler Infrastructure
 //