title: Error while building for iOS from Unity in Xcode 7
body: <p>I'm getting this error which is causing a build fail in Xcode after building the project from Unity:</p>
  
  <pre><code>fatal error: lipo: can't write to output file: /Users/applemac/Library/Developer/Xcode/DerivedData/Unity-iPhone-hdkycurnjlkvikcljdgvlfnbmsua/Build/Products/Release-iphoneos/spacegame.app.dSYM/Contents/Resources/DWARF/spacegame.lipo (Undefined error: 0)
  </code></pre>
  
  <p>What does it mean and how do I fix it?
  The app is for iPhone and iPad if it makes any difference. 
  Thanks in advance. </p>