camera_capture: change topic namings to make logging, mavlink streaming and geotagging easier

src/modules/logger/logger.cpp

@@ -621,6 +621,7 @@ void Logger::add_default_topics()
 	add_topic("battery_status", 500);
 	add_topic("camera_capture");
 	add_topic("camera_trigger");
+	add_topic("camera_trigger_secondary");
 	add_topic("cpuload");
 	add_topic("distance_sensor", 100);
 	add_topic("ekf2_innovations", 200);