add $.jGrowl as an XSS sink

javascript/ql/src/semmle/javascript/security/dataflow/Xss.qll

@@ -99,6 +99,8 @@ module DomBasedXss {
       this = any(Typeahead::TypeaheadSuggestionFunction f).getAReturn()
       or
       this = any(Handlebars::SafeString s).getAnArgument()
+      or
+      this = any(JQuery::MethodCall call | call.getMethodName() = "jGrowl").getArgument(0)
     }
   }