Add 'geoclue' systemd user service

.config/systemd/user/geoclue-agent.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=redshift needs to get a (geo)clue
+
+[Service]
+ExecStart=/usr/lib/geoclue-2.0/demos/agent
+
+[Install]
+WantedBy=default.target