Update copyright

debian/copyright

@@ -11,6 +11,10 @@ Files: qiconfix/*
 Copyright: 2013 Digia Plc and/or its subsidiary(-ies)
 License: LGPL-2.1-or-3 with Digia-1.1 exception
 
+Files: qiconfix/*_qt4*
+Copyright: Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+License: LGPL-2.1 with Digia-1.1 exception or GPL-3
+
 Files: debian/*
 Copyright: 2014-2015 ChangZhuo Chen (陳昌倬) <czchen@gmail.com>
            2013-2015 Alf Gaida <agaida@siduction.org>
@@ -68,4 +72,16 @@ License: LGPL-2.1-or-3 with Digia-1.1 exception
  five lines or less in length.
  .
  Furthermore, you are not required to apply this additional permission to a
- modified version of the Library.
+ modified version of the Library.
+
+License: GPL-3
+ Alternatively, this file may be used under the terms of the GNU General
+ Public License version 3.0 as published by the Free Software Foundation
+ and appearing in the file LICENSE.GPL included in the packaging of this
+ file. Please review the following information to ensure the GNU General
+ Public License version 3.0 requirements will be met:
+ .
+ http://www.gnu.org/copyleft/gpl.html.
+ .
+ On Debian systems, the complete text of the GNU General Public License
+ 3 can be found in `/usr/share/common-licenses/GPL-3`.