Flying Wing init files: Fix up main output docs

ROMFS/px4fmu_common/init.d/airframes/3000_generic_wing

@@ -5,6 +5,14 @@
 # @type Flying Wing
 # @class Plane
 #
+# @output MAIN1 left aileron
+# @output MAIN2 right aileron
+# @output MAIN4 throttle
+#
+# @output AUX1 feed-through of RC AUX1 channel
+# @output AUX2 feed-through of RC AUX2 channel
+# @output AUX3 feed-through of RC AUX3 channel
+#
 # @maintainer
 #
 

ROMFS/px4fmu_common/init.d/airframes/3034_fx79

@@ -9,6 +9,10 @@
 # @output MAIN2 left aileron
 # @output MAIN4 throttle
 #
+# @output AUX1 feed-through of RC AUX1 channel
+# @output AUX2 feed-through of RC AUX2 channel
+# @output AUX3 feed-through of RC AUX3 channel
+#
 # @maintainer Simon Wilks <simon@uaventure.com>
 #
 

ROMFS/px4fmu_common/init.d/airframes/3035_viper

@@ -5,6 +5,14 @@
 # @type Flying Wing
 # @class Plane
 #
+# @output MAIN1 left aileron
+# @output MAIN2 right aileron
+# @output MAIN4 throttle
+#
+# @output AUX1 feed-through of RC AUX1 channel
+# @output AUX2 feed-through of RC AUX2 channel
+# @output AUX3 feed-through of RC AUX3 channel
+#
 # @maintainer Simon Wilks <simon@uaventure.com>
 #
 

ROMFS/px4fmu_common/init.d/airframes/3100_tbs_caipirinha

@@ -5,6 +5,14 @@
 # @type Flying Wing
 # @class Plane
 #
+# @output MAIN1 left aileron
+# @output MAIN2 right aileron
+# @output MAIN4 throttle
+#
+# @output AUX1 feed-through of RC AUX1 channel
+# @output AUX2 feed-through of RC AUX2 channel
+# @output AUX3 feed-through of RC AUX3 channel
+#
 # @maintainer Lorenz Meier <lorenz@px4.io>
 #