scd: Make "learn" report about KDF data object.
* scd/app-openpgp.c (do_learn_status): Report KDF attr. * g10/card-util.c (current_card_status): Output KDF for with_colons.
Backport of master commit: 05d163aebc04db109ec5e004eb04a4b3796f6421
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>