Add tags so emacs knows these are C++ files


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@483 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAlloc/IGNode.h b/lib/CodeGen/RegAlloc/IGNode.h
index 03bcfc0..2f437f9 100644
--- a/lib/CodeGen/RegAlloc/IGNode.h
+++ b/lib/CodeGen/RegAlloc/IGNode.h
@@ -1,4 +1,4 @@
-/* Title:   IGNode.h
+/* Title:   IGNode.h                      -*- C++ -*-
    Author:  Ruchira Sasanka
    Date:    July 25, 01
    Purpose: Represents a node in an interference graph.