Add bug 360220 testcase to list of tests (forgotten in initial checkin)

testing/mochitest/tests/index.html

@@ -95,6 +95,7 @@ RunSet.runall = function() {
       'test_bug358797.html',
       'test_bug359657.html',
       'test_bug359754.xul',
+      'test_bug360220.xul',
       'test_bug362391.xhtml',
       'test_bug362788.xhtml',
       'test_bug364092.xhtml',