grub-probe/update-grub/reconfigure gnumach-image disasters fixed

[Samuel Thibault <samuel.thibault@gnu.org>]

Hello,

The latest commit in gnumach should be fixing the disasters that some
people have been seeing in their hurd system. This was due to an
improper handling of non-block-aligned reads in the gnumach linux block
glue, which happens only if partitions are not block-aligned, leading to
putting disk data into random physical pages (!).

I'm uploading a fixed gnumach package.

That was for me one of the last bits to fix before making a Debian
GNU/Hurd release, does anybody have something else?

Samuel