[PATCH,HURD] Fix grub-probe with userland partition support

[Samuel Thibault]

Hello,

GNU/Hurd is moving to userland partition support, i.e. /dev/hd0s* slices
are actually served by userland translators which use libparted.  The
grub probe code needs to be fixed for that, here is a proposed patch.

The principle is that it gets the store translator behind the file being
probed for, and compares the storage area there with what grub detects
itself.  That is why it makes use of the map array, which I preferred
to rename to hostdisk_map (thus big but trivial changes in hostdisk.c):
even if it was already an external symbol, it's preferrable to prefix
it.

Samuel

patch
Description: Text document