title: module-Swift.h file not found in mm file in building Unity-Swift framework
body: <p>I followed this URL.
  <a href="https://medium.com/@kevinhuyskens/implementing-swift-in-unity-53e0b668f895" rel="nofollow noreferrer">https://medium.com/@kevinhuyskens/implementing-swift-in-unity-53e0b668f895</a></p>
  
  <p>But I have issues.<a href="https://i.stack.imgur.com/H4xm4.png" rel="nofollow noreferrer">I have attached issue image</a></p>