title: 28 duplicate symbols for architecture arm64
body: <p><a href="https://i.stack.imgur.com/S6RiS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S6RiS.png" alt="enter image description here"></a></p>
  
  <p>28 duplicate symbols for architecture arm64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  Using GoogleMobileAdsSdkiOS-7.6.0.
  This working in my device and simulator without problem and i'm getting ads on banner, but when i archive to update in store it's showing this error, Please help any one already spent 1 day. 
  Using Xcode 6.1.1</p>