Update copyright dates to include 2012.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12843 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/callgrind/context.c b/callgrind/context.c
index 42d8e4f..dcadcb6 100644
--- a/callgrind/context.c
+++ b/callgrind/context.c
@@ -6,7 +6,7 @@
 /*
    This file is part of Callgrind, a Valgrind tool for call tracing.
 
-   Copyright (C) 2002-2011, Josef Weidendorfer (Josef.Weidendorfer@gmx.de)
+   Copyright (C) 2002-2012, Josef Weidendorfer (Josef.Weidendorfer@gmx.de)
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as