wkd: Silence gpg-wks-client diagnostics from gpg.
* tools/gpg-wks-client.c (add_user_id): PAss --quiet to gpg unless we are running in double verbose mode. (decrypt_stream): Ditto (encrypt_response): Ditto. (mirror_one_keys_userid): Ditto. * tools/wks-util.c (wks_get_key): Ditto. (wks_list_key): Ditto. (wks_filter_uid): Ditto. (cherry picked from commit 4364283f757fceab454d48d461a9f88c31247a07)