Update copyright date in LICENSE.txt to 2012.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@24716 44c647ce-9c0f-0410-b52a-842ac1e357ba

LICENSE.txt

@@ -1,4 +1,4 @@
-Copyright (c) 2005-2010, Zend Technologies USA, Inc.
+Copyright (c) 2005-2012, Zend Technologies USA, Inc.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,