[js] fix errors found by make js-lint

Author: pmurias

src/vm/js/nqp-runtime/runtime.js

@@ -61,7 +61,7 @@ exports.load_setting = function(settingName) {
 
 exports.load_module = function(module) {
   saveCtx(module, function() {
-    module = module.replace(/::/g,"/");
+    module = module.replace(/::/g, '/');
     require(module);
   });
 };