qtox repo only works with certain architectures

src/freedombone-image-customise

@@ -1054,9 +1054,13 @@ function configure_user_interface {
 	# browser
 	chroot "$rootdir" apt-get -y install iceweasel
 
+	# NOTE: The Tox repo only supports a limited range of architectures
+	if [[ $ARCHITECTURE == 'amd64' || $ARCHITECTURE == 'i386' ]]; then
 		# Tox user interface
 		enable_tox_repo
+		# TODO: this may not work on all architectures
 		chroot "$rootdir" apt-get -y install qtox
+	fi
 
 	# Syncthing
 	install_syncthing