cmake: generate and install share/qi/path.conf
cmake: generate and install share/qi/path.conf

This used to be done in qibuild, but that's a bad idea

Change-Id: I45e13a5ff36985e43dd295e748b764a62fe8d4c2
Reviewed-on: http://gerrit.aldebaran.lan/69892
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>
Tested-by: gerrit
Reviewed-by: vpaleologue <cb19838a79eb484e12a6960acfbf7c16dfdb80d9@aldebaran-robotics.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi