QtIFW

Fix QTIFW-46.

Only create the target dir and not the full path to target.
Add a small fix for all installations using refactor, which
prevents the full folder hierarchy removal on uninstall.

Change-Id: Ibe025fb2bc3766b8b67cb3932b506543b2f24af8
Reviewed-on: http://codereview.qt-project.org/5804
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>