gpg: Do not import revocations with --show-keys.
* g10/import.c (import_revoke_cert): Add arg 'options'. Take care of IMPORT_DRY_RUN.
(cherry picked from commit 6c9e37b2e541e96e7c65e1679982a614b4863fdb)
- GnuPG-bug-id: T4017
- Signed-off-by: Werner Koch <wk@gnupg.org>