* src/engine-gpg.c: Add and use function for adding ADSKs.
* src/genkey.c: Prevent error due to no status line.
* src/gpgme.h.in: Add flag GPGME_CREATE_ADSK
* doc/gpgme.texi: Add documentation for ADSKs
* tests/run-genkey.c: Add test for adding ADSKs
--
This adds the ability to add ADSKs through
the gpgme_createsubkey interface.
The function must be called with NULL userid,
the ADSK fingerprint in algo
and the GPGME_CREATE_ADSK flag.