Qnx: Update target list after Environment Setup Wizard

Task-number: QTCREATORBUG-10795

Change-Id: Ia158370a00762190fa4b209e27c52c2ef32e5819
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Tobias Nätterlund <tobias.naetterlund@kdab.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>