gpg: Support EAX if for latest Libgcrypt.
* g10/cipher-aead.c (MY_GCRY_CIPHER_MODE_EAX): New. (write_header): Use it. * g10/decrypt-data.c (MY_GCRY_CIPHER_MODE_EAX): New. (decrypt_data): Use it. * g10/misc.c (openpgp_aead_test_algo): Allow EAX.
This allows the use of EAX when the latest Libgcrypt master is used.
- Signed-off-by: Werner Koch <wk@gnupg.org>