title: Disable Test target in Xcode
body: <p>I have 2 targets in my Xcode project, 1 app target and 1 test target.
  Since my project has become rather large to compile I want to disable the test target so it doesn't need to compile my Swift files twice for both targets.</p>
  
  <p>Any idea how to disable (not remove) my test target from building?</p>