Fix the inconsistency for the QtWinExtras of the copyright header added

Change-Id: I787d3bcd2fee7c03c86ff5cf904fc0916ebb2cc1
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>

examples/iconextractor/main.cpp

@@ -3,7 +3,7 @@
  ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
  ** Contact: http://www.qt-project.org/legal
  **
- ** This file is part of QtWindowsExtras in the Qt Toolkit.
+ ** This file is part of QtWinExtras in the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** Commercial License Usage