message: feat(weex): wrap IFFE for appCode
diff: @@ -94,6 +94,8 @@ export function createInstance (
  weex: weexInstanceVar
  }, timerAPIs, env.services)
  + appCode = `(function(global){ \n${appCode}\n })(Object.create(this))`
  +
  if (!callFunctionNative(instanceVars, appCode)) {
  // If failed to compile functionBody on native side,
  // fallback to 'callFunction()'.
  