QtIFW

Fix the steps we perform to build an installer.

We need to keep a specific order, otherwise the data might endup in
the resource file as well and gets appended twice to the installer
binary.

Task-number: QTIFW-564
Change-Id: Idcadb5d65043d1855846556b63191898a4a54027
Reviewed-by: Christoph Vogtländer <c.vogtlaender@sigma-surface-science.com>
Reviewed-by: Niels Weber <niels.weber@digia.com>