Inexplicably, the grub issue has somehow started affecting F39
server images. Even though neither grub2 nor xfsprogs changed
at all in F39. I can't explain it, but it's nearly midnight and
I don't want to wake up to a wall of failed tests, so we're
trying this. The repo has a build of grub2 with the patch put
back, just like in Rawhide.
Signed-off-by: Adam Williamson <awilliam@redhat.com>