Choose Qt5 version of PolkitQt when build with Qt5.
Choose Qt5 version of PolkitQt when build with Qt5.

lxde/lxqt-policykit,rbazaud/lxqt-policykit,pmattern/lxqt-policykit,rbazaud/lxqt-policykit,ThomasVie/lxqt-policykit,lxde/lxqt-policykit,pmattern/lxqt-policykit,ThomasVie/lxqt-policykit,smart2128/lxqt-policykit,smart2128/lxqt-policykit