title: target specifies product type 'com.apple.product-type.watchkit2-extension', but there's no such product type for the 'iphoneos' platform
body: <p>I already have a Watch app written for iOS 8.2, I want to configure a Watch app for watch OS 2 and deliver both versions of mine Watch app inside the same iOS app. So I create a new Watch App Target for WatchOS2 with Xcode7.0, but it can not work.
  How to do?
  Thanks!</p>