uwsgi: Allow to build Cutelyst if uwsgi is available but pkg-config isn't
uwsgi: Allow to build Cutelyst if uwsgi is available but pkg-config isn't

cutelyst/cutelyst,simonaw/cutelyst,buschmann23/cutelyst,buschmann23/cutelyst,cutelyst/cutelyst,cutelyst/cutelyst,buschmann23/cutelyst,simonaw/cutelyst