qi_generate_qt_conf: fix for mac
qi_generate_qt_conf: fix for mac

Change-Id: I469a74aa9abda6d88e3f101d644350ae886040e8

dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild