unbreak installation after project move

Change-Id: I47e9e7009978b494e6b2b06f793bf1948d443b72
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
remove pointless assignments

the magic in qt_example_installs.prf handles this automatically.

Change-Id: I19f0560a6e3d2ddbe8a0128b463aecb7ff45475e
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>