cryptsetup: bump copyright header

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

utils/cryptsetup/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2006-2014 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.