Update copyright info for 2013

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Makefile

@@ -1,7 +1,7 @@
 # Makefile for buildroot2
 #
 # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
-# Copyright (C) 2006-2012 by the Buildroot developers <buildroot@uclibc.org>
+# Copyright (C) 2006-2013 by the Buildroot developers <buildroot@uclibc.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

docs/copyright.txt

@@ -1,6 +1,6 @@
 
 The code and graphics on this website (and it's mirror sites, if any) are
-Copyright (c) 1999-2005 by Erik Andersen, 2006-2012 The Buildroot
+Copyright (c) 1999-2005 by Erik Andersen, 2006-2013 The Buildroot
 developers. All rights reserved.
 
 Documents on this Web site including their graphical elements, design, and

docs/footer.html

@@ -10,7 +10,7 @@
     <p>
     <font face="arial, helvetica, sans-serif" size="-1">
 	<a HREF="/copyright.txt">Copyright &copy; 1999-2005 Erik Andersen,
-	2006-2012 The Buildroot developers</a>
+	2006-2013 The Buildroot developers</a>
 	<br>
 	Mail all comments, insults, suggestions and bribes to
 	<br>