Adding SEED cipher algorithm to openssl backends

SEED is a block cipher developed by the Korea Information Security Agency (KISA) and  adopted by several standard protocols: S/MIME (RFC 4010), TLS/SSL (RFC 4162), IPSec (RFC 4196), and ISO/IEC 18033-3:2010. It is used broadly throughout South Korean industry. 
-- OpenSSL supports SEED cipher from version 0.8.9e