gpgsm: New commands --export-secret-key-{p8,raw}
* sm/gpgsm.c: Add new commands. * sm/minip12.c (build_key_sequence): Add arg mode. (p12_raw_build): New. * sm/export.c (export_p12): Add arg rawmode. Call p12_raw_build. (gpgsm_p12_export): Ditto. (print_short_info): Print the keygrip.