Update copyright line to 2015
diff --git a/library/net.c b/library/net.c
index cf9f147..0e5edc0 100644
--- a/library/net.c
+++ b/library/net.c
@@ -1,7 +1,7 @@
 /*
  *  TCP networking functions
  *
- *  Copyright (C) 2006-2010, ARM Limited, All Rights Reserved
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *
  *  This file is part of mbed TLS (https://polarssl.org)
  *