bench-slope: add X25519 and X448 scalar multiplication
* tests/bench-slope.c (ECC_ALGO_X25519, ECC_ALGO_X448): New. (ecc_algo_name, ecc_algo_curve, ecc_nbits): Add X25519 and X448. (bench_ecc_mult_do_bench): Pass Y as NULL to ec_get_affine with X25519 and X448. (cipher_ecc_one): Run only multiplication bench for X25519 and X448.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>