add failing test

Author: erik-krogh

javascript/ql/test/query-tests/Security/CWE-601/ClientSideUrlRedirect/tst11.js

@@ -0,0 +1,6 @@
+// OK
+function foo() {
+    var urlParts = document.location.href.split('?');
+    var loc = urlParts[0] + "?" + boxes.value;
+    window.location = loc
+}