Improve user experience with examples integrated in QtCreator on QNX

The way how examples are now integrated into the Welcome Page and can opened directly from there is great! On QNX, there are still two manual steps required before a user can get an example running on a target:

• (re)define the target settings in the pro file:

qnx  {
    target.path = /tmp/$${TARGET}/bin
    INSTALLS += target
}

This is required because the current default deployment path is /opt which resides on a read-only partition on most embedded systems and is can be written by the "root" user on the most desktops

• Add environment vars in the Run settings of the project which would point to the location of the Qt runtime on the target, e.g:

LD_LIBRARY_PATH=/tmp/qt53_rumtime_vm/lib
QML2_IMPORT_PATH=/tmp/qt53_rumtime_vm/qml
QQNX_PHYSICAL_SCREEN_SIZE="150,90"
QT_PLUGIN_PATH=/tmp/qt53_rumtime_vm/plugins
QT_QPA_FONTDIR=/tmp/qt53_rumtime_vm/lib/fonts

How those can be eliminated? We should sync a related change with according works to improve deployment on BB10, QNX and in Qt in general