make shell_exec() stub consistent with system, passthru, exec and regenerate arginfo

Author: l-pt

ext/standard/basic_functions.stub.php

@@ -1004,8 +1004,11 @@ function escapeshellcmd(string $command): string {}
 /** @refcount 1 */
 function escapeshellarg(string $arg): string {}
 
-/** @refcount 1 */
-function shell_exec(string $command, int &$result_code = null): string|false|null {}
+/**
+ * @param int $result_code
+ * @refcount 1
+ */
+function shell_exec(string $command, &$result_code = null): string|false|null {}
 
 #ifdef HAVE_NICE
 function proc_nice(int $priority): bool {}

ext/standard/basic_functions_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 96393b26861733e5c7fc9a12095a29c07ed73928 */
+ * Stub hash: 57b39034cfe4b7421db6a6cc09ba4b086e95d646 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_set_time_limit, 0, 1, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO(0, seconds, IS_LONG, 0)