gpg: Support Kyber with Brainpool512r1.
* common/openpgp-oid.c (oidtable): Add GCRY_KEM_RAW_BP512. * agent/pkdecrypt.c (ecc_table): Support bp512 * g10/pkglue.c (do_encrypt_kem): Ditto. * tests/openpgp/samplekeys: Add sample keys for kyber_bp256, bp384, and bp512. * tests/openpgp/privkeys: Add corresponding private keys. * tests/openpgp/samplemsgs: Add sample messages for those keys.
- GnuPG-bug-id: T6815