QtIFW

Prevent too long install path.

Task-number: QTIFW-201

Change-Id: Ie3c493149971ee3b00b3390ce7e301df4662650a
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>