grub-bios-setup requires two images (boot.img and core.img),
but they are missing. This make an error during sysupgrade:
Upgrading bootloader on /dev/sda...
grub-bios-setup: error: cannot open `/tmp/boot/boot/grub/boot.img': No
such file or directory.
Signed-off-by: 李国 <uxgood.org@gmail.com>
32f675ca9f