fix qibuild --verbose-make when using Ninja

Change-Id: Ie24f428d2a123cfeda049fe1357b18a7b71f5f6b
Reviewed-on: http://gerrit.aldebaran.lan:8080/10089
Reviewed-by: ncornu <ncornu@aldebaran-robotics.com>
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
cmake: fix qi_install_python in some corner cases

(in this case, when python is not a package in a toolchain)

Change-Id: I756eeac3f3020f11271c6b865dfeb0442573d38a
Reviewed-on: http://gerrit.aldebaran.lan:8080/10515
Reviewed-by: smartin <smartin@aldebaran-robotics.com>
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>