Update copyright dates to 2010.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11121 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/callgrind/sim.c b/callgrind/sim.c
index a84ee5a..e79d9e2 100644
--- a/callgrind/sim.c
+++ b/callgrind/sim.c
@@ -11,7 +11,7 @@
    Copyright (C) 2003-2005, Josef Weidendorfer (Josef.Weidendorfer@gmx.de)
 
    This tool is derived from and contains code from Cachegrind
-   Copyright (C) 2002-2009 Nicholas Nethercote (njn@valgrind.org)
+   Copyright (C) 2002-2010 Nicholas Nethercote (njn@valgrind.org)
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as