title: Flutter upgrade fail
body: <p>When I attempt to update Flutter I get the following error.</p>
  
  <blockquote>
    <p>error: Your local changes to the following files would be overwritten
    by merge:
      examples/flutter_gallery/ios/Runner.xcodeproj/project.pbxproj </p>
    
    <p>Please
    commit your changes or stash them before you merge. </p>
    
    <p>Aborting Updating
    f9bb4289e..5ab9e7072 Process finished with exit code 1</p>
  </blockquote>
  
  <p>I suspect at some point I did something in the examples project and I don't care about loosing the changes.  </p>
  
  <p>What is the easiest thing to do?</p>