Just updated to Xcode 7.1 and getting this error. Was able to upload fine using 7.0.1
Clean project not work with me in XCode 7.2. But I solve the problem by export Archive and using Application Loader.
Step:
Archive you build.
In Organizer: Chose your archive.
Export "Save for iOS App Store Deployment".
Open Application Loader (Xcode -> Open Developer Tool -> Application Loader: Download it if you don't have).
Select "Deliver your App" -> Select your exported ipa.
Upload.
=> Done