luajit: upgrade to 2.0.3, add native support

* http://luajit.org/changes.html

 says:
  This release has the new PS4 port and various important bugfixes over
  2.0.2 - an update is recommended.
* add native support (used by efl-native)
* drop lua dependency, it doesn't need lua to be built before luajit
* LIC_FILES_CHKSUM change is only from copyright year update
  < Copyright (C) 2005-2013 Mike Pall. All rights reserved.
  ---
  > Copyright (C) 2005-2014 Mike Pall. All rights reserved.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>