Update copyright dates to include 2012.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12843 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/include/valgrind.h b/include/valgrind.h
index b2f016e..cc2cf3d 100644
--- a/include/valgrind.h
+++ b/include/valgrind.h
@@ -12,7 +12,7 @@
    This file is part of Valgrind, a dynamic binary instrumentation
    framework.
 
-   Copyright (C) 2000-2011 Julian Seward.  All rights reserved.
+   Copyright (C) 2000-2012 Julian Seward.  All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions