Update error message in require_directory test

Author: krakjoe

Zend/tests/require_directory.phpt

@@ -11,4 +11,7 @@ require $dir;
 --EXPECTF--
 Notice: require(): Read of %d bytes failed with errno=21 Is a directory in %s on line %d
 
-Fatal error: require(): Failed opening required '%s' (include_path='%s') in %s on line %d
+Fatal error: Uncaught Error: Failed opening required '%s' (include_path='.:') in %s:%d
+Stack trace:
+#0 {main}
+  thrown in %s on line %d