title: Xcode "Missing Submodule" warning
body: <p>I'm using Xcode6 GM to create a Coacoa Touch Framework (a new function in Xcode6), then this framework is included into my app. </p>
  
  <p>Everything is fine (works fine), except that I get warnings in "#import". What is the root cause?</p>
  
  <p><img src="https://i.stack.imgur.com/ABZLi.png" alt="enter image description here"></p>