mkefidisk.sh: Cope with translations and modelnames with 'Disk' in it.

mkefidisk.sh: Cope with translations and modelnames with 'Disk' in it.

The script greps for 'Disk', which doesn't work when your crazy Dutch distro has parted call it 'Schijf', so force LANG=C.

The second problem is that 'Disk' might be a substring in the Model entry:

[root@Angstrom-F16-vm-rpm contrib] # parted /dev/sdc  unit mb print
Model: SanDisk SDDR-113 (scsi)
Disk /dev/sdc: 3905MB

(From OE-Core rev: 2e404930f6fc7d818d2f429793e84bce77163afd)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>