title: podspec warning: no rule to process file for architecture i386
body: <p>My Podspec like this:</p>
  
  <p>s.resource = 'JOBaseSDK/Resources/**/*.{png,txt}'</p>
  
  <p>I'll get warning when pod spec lint in terminal</p>
  
  <ul>
  <li>NOTE  |  warning: no rule to process file 'JOProjectBaseSDK/JOBaseSDK/Resources/111.txt' of type text for architecture i386</li>
  <li>NOTE  |  warning: no rule to process file 'JOProjectBaseSDK/JOBaseSDK/Resources/111.txt' of type text for architecture x86_64</li>
  </ul>
  
  <p>Anyone can help me fix it? thanks!</p>