Add PHP Extension for GmSSL

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

php/ext/openssl/tests/openssl_sign_basic.phpt

@@ -0,0 +1,22 @@
+--TEST--
+openssl_sign() tests
+--SKIPIF--
+<?php if (!extension_loaded("openssl")) print "skip"; ?>
+--FILE--
+<?php
+$data = "Testing openssl_sign()";
+$privkey = "file://" . dirname(__FILE__) . "/private_rsa_1024.key";
+$wrong = "wrong";
+
+var_dump(openssl_sign($data, $sign, $privkey));                 // no output
+var_dump(openssl_sign($data, $sign, $wrong));
+var_dump(openssl_sign(array(), $sign, $privkey));
+?>
+--EXPECTF--	
+bool(true)
+
+Warning: openssl_sign(): supplied key param cannot be coerced into a private key in %s on line %d
+bool(false)
+
+Warning: openssl_sign() expects parameter 1 to be string, array given in %s on line %d
+NULL