Update copyright line to 2015
diff --git a/include/polarssl/md.h b/include/polarssl/md.h
index 1261c94..e94f9be 100644
--- a/include/polarssl/md.h
+++ b/include/polarssl/md.h
@@ -5,7 +5,7 @@
  *
  * \author Adriaan de Jong <dejong@fox-it.com>
  *
- *  Copyright (C) 2006-2011, ARM Limited, All Rights Reserved
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *
  *  This file is part of mbed TLS (https://polarssl.org)
  *