e2fsprogs: remove uuidgen support

e2fsprogs: remove uuidgen support

In fact, uuidgen was never built because we pass --disable-libuuid. So
the option was a NOP.

Remove the license info for libuuid.

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
[Arnout:
 - do not remove --disable-uuidd - even though that is implied by
   --disable-libuuid, it's better to be explicit about it;
 - remove license info of libuuid]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>