Adding rule to global distclean to remove build/ directory.
Adding rule to global distclean to remove build/ directory.

bindle/iOSPorts,tharpa/iOSPorts,tharpa/iOSPorts,lhunath/iOSPorts,lhunath/iOSPorts,bindle/iOSPorts,tipbit/iOSPorts,tipbit/iOSPorts