[fprint] Export fingerprint readers in libfprint

[Timo Hoenig]

On Thu, 2008-10-23 at 13:31 +0200, Timo Hoenig wrote:

> Also, we should probably extract the driver names automatically to
> push maintenance costs towards zero.

Forget that.  The corresponding follow-up slipped through my attention
as it was only sent to the fprint list.

Thanks,

   Timo