Add PHP Extension for GmSSL

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

php/ext/openssl/tests/openssl_x509_free_basic.phpt

@@ -0,0 +1,16 @@
+--TEST--
+openssl_x509_free() tests
+--SKIPIF--
+<?php if (!extension_loaded("openssl")) print "skip"; ?>
+--FILE--
+<?php
+var_dump($res = openssl_x509_read("file://" . dirname(__FILE__) . "/cert.crt"));
+openssl_x509_free($res);
+var_dump($res);
+openssl_x509_free(false);
+?>
+--EXPECTF--
+resource(%d) of type (OpenSSL X.509)
+resource(%d) of type (Unknown)
+
+Warning: openssl_x509_free() expects parameter 1 to be resource, boolean given in %s on line %d