Add PHP Extension for GmSSL

View http://gmssl.org/docs/php-api.html for more info.

php/ext/openssl/tests/openssl_digest_basic.phpt

@@ -0,0 +1,16 @@
+--TEST--
+openssl_digest() basic test
+--SKIPIF--
+<?php if (!extension_loaded("openssl")) print "skip"; ?>
+--FILE--
+<?php
+$data = "openssl_digest() basic test";
+$method = "md5";
+$method2 = "sha1";
+
+var_dump(openssl_digest($data, $method));
+var_dump(openssl_digest($data, $method2));
+?>
+--EXPECT--
+string(32) "f0045b6c41d9ec835cb8948c7fec4955"
+string(40) "aa6e750fef05c2414c18860ad31f2c35e79bf3dc"