cipher:kem: Rename Classic McEliece API constants.
* src/gcrypt.h.in (GCRY_KEM_CM6688128F): Rename. * cipher/kem.c (_gcry_kem_keypair): Follow the change. (_gcry_kem_encap, _gcry_kem_decap): Likewise. * tests/t-kem.c (test_kem_mceliece6688128f): Likewise. (main): Also change CLI option name.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>