Write EC_KEY in PEM to STDOUT

openssl_pem.m

- (void)logPEMForKey:(EC_KEY *)key {
    const EC_GROUP *group = EC_KEY_get0_group(key);
    PEM_write_ECPKParameters(stdout, group);
    PEM_write_EC_PUBKEY(stdout, key);
    PEM_write_ECPrivateKey(stdout, key, NULL, NULL, 0, NULL, NULL);
}