libfprint 1.90.1 supports early match result report which allows to inform
the clients as soon as the driver detected a match/no-match without having
to wait the whole device driver deactivation.

Use this feature in fprintd, by emitting the "VerifyStatus" signal as soon
as we've an usable result we can inform the client about.

As per this, ignore any possible error we may get afterwards, due to device
issues or late user cancellation, as the point of the verification action
(i.e. getting a match/no-match) can be considered accomplished.

Fixes libfprint/fprintd#35