title: XCode 8: "Automatically manage signing" option is missing
body: <p>While building my iOS project with XCode 8, I have the following error :</p>
  
  <pre><code>Code signing is required for product type 'Application' in SDK 'iOS 10.0'
  </code></pre>
  
  <p>I found many answers and most of them are saying that checking the <code>Automatically manage signing</code> option in the project's settings page can solve the problem.</p>
  
  <p>But, the <code>Automatically manage signing</code> option is missing. How can I make it appear ?</p>