Default is SEC 1.
To use old ECIES implementation: --enable-eccencrypt=old or define
WOLFSSL_ECIES_OLD
To use ISO-18033 implememtation: --enable-eccencrypt=iso18033 or
define WOLFSSL_ECIES_ISO18033
Support passing NULL for public key into wc_ecc_decrypt().
Support not having public key in privKey passed into wc_ecc_encrypt() -
public key is calculated and stored in priKey.
Add decrypt KAT test for ECIES.
31dde4706e