Updates makefile to work on Xubuntu (linaro) 13.10.
Updates makefile to work on Xubuntu (linaro) 13.10.

andybarry/flight,peteflorence/flight,peteflorence/flight,andybarry/flight,andybarry/flight,andybarry/flight,peteflorence/flight,peteflorence/flight,peteflorence/flight,peteflorence/flight,andybarry/flight,peteflorence/flight,andybarry/flight,andybarry/flight,andybarry/flight,peteflorence/flight,peteflorence/flight,andybarry/flight,peteflorence/flight,andybarry/flight