AesEngine_X86 perf. opts.

- based on suggestions by https://github.com/benaadams
- see bcgit#414

Author: peterdettman

crypto/Contributors.html

@@ -271,6 +271,9 @@ <h3>Code Contributors:</h3>
 	    <li>
 		<p>Jozef Gajdo&scaron; (https://github.com/harrison314) - Time constructor optimization, RevokedStatus fix.</p>
 	    </li>
+		<li>
+			<p>Ben Adams (https://github.com/benaadams) - Performance optimization for AES-NI.</p>
+		</li>
 		</ul>
 	</body>
 </html>