make use of QT_PRIVATE to specify private Qt dependencies
make use of QT_PRIVATE to specify private Qt dependencies

Change-Id: Idb2ac7ee69eba085f600b422628dc42a7dc87711
Reviewed-by: Joerg Bornemann <47777b9406dbddd02a3fdca8341789a013805a11@nokia.com>

kobolabs/qtconnectivity,kobolabs/qtconnectivity,kobolabs/qtconnectivity