Apple hardware doesn't need the macboot.img to boot, efiboot.img is not
needed in the filesystem so do not graft it into it.
Remove macboot.img and apple specific EFI support
grub2-2.06-3 changes where the unicode.pf2 font file is stored.
This changes the efi.tmpl to install it from the new location, which
means that it depends on grub2-2.06-3, but there is no way to express
this in the runtime-install.tmpl so if you see a failure like:
2021-07-08 16:10:05,586: OSError: nothing matching /var/tmp/lorax/lorax.t80f74er/installroot/boot/grub2/fonts/unicode.pf2 in /
It means the new version of grub2 wasn't in the repos you used when
running lorax.
Related: rhbz#2003030
...turns out you can't just have a single template file, because lorax
just picks a single directory and expects all the data it needs to be
there. Sigh.
So this adds all the rest of the files, plus some Makefile machinery for
generating a tarball and updating the specfile after you've checked in
changes. See README for details.