title: Sudden Warnings after upgrading to XCode 5.1
body: <p>I just stumbled upon 2 warnings in my project that are really confusing.. </p>
  
  <p><strong>1.</strong>
      <code>warning: ignoring debug info with an invalid version (0)</code></p>
  
  <p><strong>2.</strong>
      <code>WARNING: Linking two modules of different target triples: 'x86_64-apple-ios7.0.0' and 'x86_64-apple-ios6.0.0'</code></p>
  
  <p>the first one was resolved by <a href="https://stackoverflow.com/a/22626889/1042240">this</a> answer's help. But after restarting my Xcode I got the warning again…</p>
  
  <p>The second one just appeared and i can't find anything on google for this…</p>
  
  <p>THanks in advance.</p>