QtIFW

Take replacements into account while running as installer.

Change-Id: Ifd34330a146ac3153bcce4e939967f0bf9cf80b5
Reviewed-on: http://codereview.qt-project.org/4459
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@nokia.com>