Update copyright dates, to include 2015.  No functional change.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15577 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/helgrind/hg_basics.c b/helgrind/hg_basics.c
index b2a22ad..6794683 100644
--- a/helgrind/hg_basics.c
+++ b/helgrind/hg_basics.c
@@ -8,7 +8,7 @@
    This file is part of Helgrind, a Valgrind tool for detecting errors
    in threaded programs.
 
-   Copyright (C) 2007-2013 OpenWorks Ltd
+   Copyright (C) 2007-2015 OpenWorks Ltd
       info@open-works.co.uk
 
    This program is free software; you can redistribute it and/or