Fix using qibuild install with Ninja

Change-Id: I5461a8fa814023aadb65d2627b107a2edd2e2a9d
Reviewed-on: http://gerrit.aldebaran.lan:8080/13291
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>