Propagate Tor Launcher options via the wrapper.

E.g. for our custom/undocumented (but so far unused)
`--force-net-config` option.

config/chroot_local-includes/usr/local/sbin/tails-tor-launcher

@@ -26,7 +26,7 @@ done
 export LANG
 export_gnome_env
 sudo -u ${LIVE_USERNAME} xhost +SI:localuser:tor-launcher
-gksudo -u tor-launcher /usr/local/bin/tor-launcher
+gksudo -u tor-launcher /usr/local/bin/tor-launcher -- "$@"
 RET=${?}
 sudo -u ${LIVE_USERNAME} xhost -SI:localuser:tor-launcher