cipher: Support internal hashing for RSA-PSS.
* cipher/pubkey-util.c (_gcry_pk_util_data_to_mpi): Support "hash-algo" with "value" for internal hashing with RSA-PSS. * tests/basic.c (check_pubkey_sign): Add test cases.
- GnuPG-bug-id: T5529
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>