Update copyright dates (20XY-2012 ==> 20XY-2013)


git-svn-id: svn://svn.valgrind.org/vex/trunk@2792 8f6e269a-dfd6-0310-a8e1-e2731360e62c
diff --git a/priv/guest_s390_toIR.c b/priv/guest_s390_toIR.c
index 85af405..7c5d808 100644
--- a/priv/guest_s390_toIR.c
+++ b/priv/guest_s390_toIR.c
@@ -8,7 +8,7 @@
    This file is part of Valgrind, a dynamic binary instrumentation
    framework.
 
-   Copyright IBM Corp. 2010-2012
+   Copyright IBM Corp. 2010-2013
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as