[gtk+/portal] Update header

[Matthias Clasen <matthiasc src gnome org>]

commit fe5cd51470f63057e58269af84e925970b4c7e04
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jul 6 23:14:39 2016 -0400

    Update header
    
    Its not 2006 anymore...

 gtk/gtkprintoperation-portal.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkprintoperation-portal.c b/gtk/gtkprintoperation-portal.c
index b8698b7..ac12112 100644
--- a/gtk/gtkprintoperation-portal.c
+++ b/gtk/gtkprintoperation-portal.c
@@ -1,7 +1,6 @@
 /* GTK - The GIMP Toolkit
- * gtkprintoperation-unix.c: Print Operation Details for Unix 
- *                           and Unix-like platforms
- * Copyright (C) 2006, Red Hat, Inc.
+ * gtkprintoperation-portal.c: Print Operation Details for sandboxed apps
+ * Copyright (C) 2016, Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public