Some small improvements #1
2023-03-27
Makefile: Use variable for qemu
This way users can specify which backend to use without having to change the Makefile itself.
Makefile: Quench qemu warning about image format
qemu deems format autodetection to be dangerous on raw images, so make sure we specify exactly what we want to do. This will quench a scary-looking warning right when launching PonyDOS. There's no functional change otherwise.