MFH: Fix cwd when running tests out of tree with ZTS builds (fixes #45837)

Author: arnaud-lb

run-tests.php

@@ -996,15 +996,15 @@ function error_report($testname, $logname, $tested)
 
 function system_with_timeout($commandline, $env = null, $stdin = null)
 {
-	global $leak_check;
+	global $leak_check, $cwd;
 
 	$data = '';
 
 	$proc = proc_open($commandline, array(
 		0 => array('pipe', 'r'),
 		1 => array('pipe', 'w'),
 		2 => array('pipe', 'w')
-		), $pipes, null, $env, array('suppress_errors' => true, 'binary_pipes' => true));
+		), $pipes, $cwd, $env, array('suppress_errors' => true, 'binary_pipes' => true));
 
 	if (!$proc) {
 		return false;