title: Could not build module Darwin - arm64 issues
body: <p>I developed my first XCode5 ONLY app which is very similar to the apps I have done on 4.6.  It runs perfectly OK in the simulator and on my iPhone 4, 4S and 5, as well as my 2 iPads.
  However, when I try to validate it for submission to the App Store, I get a whole stack of errors relating to arm64 requires 7.0.0 or later.  I have the deployment target set to 6.1 and this does not happen when I run my previous apps in Xcode 5 that had been started in 4.6.
  If I change the deployment target to 7.0 then everything is OK.
  What is happening here? What do I need to change to get it to validate on 6.1?
  Thanks.
  <img src="https://i.stack.imgur.com/EAoEe.jpg" alt="Screengrab"></p>
  
  <p>EDIT: OK, I changed the Architectures in Build Settings to Standard (armv7, armv7s) removing arm64, and everything was OK.  Was that the right thing to do?  Presumably it will still run on the iPhone 5S, but not in 64-bit. Correct?</p>