Add PHP Extension for GmSSL

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

php/ext/openssl/tests/openssl_encrypt_crash.phpt

@@ -0,0 +1,13 @@
+--TEST--
+openssl_encrypt() crash with old OpenSSL
+--SKIPIF--
+<?php if (!extension_loaded("openssl")) print "skip"; ?>
+--FILE--
+<?php
+openssl_encrypt('', 'AES-128-CBC', 'foo');
+var_dump("done");
+?>
+--EXPECTF--
+
+Warning: openssl_encrypt(): Using an empty Initialization Vector (iv) is potentially insecure and not recommended in %s on line %d
+string(4) "done"