gpg: Add new field no 18 to the colon listing.

* g10/misc.c (gnupg_pk_is_compliant): New.
* g10/keylist.c (print_compliance_flags): New.
(list_keyblock_colon): Call it here.
* sm/keylist.c (print_compliance_flags): New.
(list_cert_colon): Call it here.

This patch is to convey information about DE_VS compliant keys to the
caller. The double digit value is used so that parsers do the right
thing and don't just look for a single digit.

• Signed-off-by: Werner Koch <wk@gnupg.org>