Use HostApp makefile fragment
Also fix makefile so that the generated usbdevs.h & usbdevs_data.h files are actually treated as dependencies for building makedevs
Requires RiscOS/BuildSys!61 (merged)
Also fix makefile so that the generated usbdevs.h & usbdevs_data.h files are actually treated as dependencies for building makedevs
Requires RiscOS/BuildSys!61 (merged)