qtsensors examples are installed to wrong location

After "make install", the qtsensors examples appear in $PREFIX/examples/sensors. Post-modularization, all examples belonging to a module should appear under $PREFIX/examples/<modulename>, i.e. $PREFIX/examples/qtsensors in this case.

Looking at the sources, it appears that the examples in the module are in examples/sensors (should just be directly under examples, no need to repeat part of the module name here) and that the module name is missing from the target install directory.