ecc: Support flags and debug print in _gcry_mpi_ec_internal_new.
* cipher/ecc-curves.c (mpi_ec_get_elliptic_curve): Don't set *r_flags. (_gcry_mpi_ec_internal_new): Add r_flags argument. Parse the flag list. Output to debug channel when DBG_CIPHER.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>