Fix XCTest when iOS 6.1 simulator is installed and Xcode 5.1 is used.
Fix XCTest when iOS 6.1 simulator is installed and Xcode 5.1 is used.

davidmdavis/contentful.objc,contentful/contentful.objc,danieleggert/contentful.objc,davidmdavis/contentful.objc,davidmdavis/contentful.objc,danieleggert/contentful.objc,contentful/contentful.objc,contentful/contentful.objc,danieleggert/contentful.objc,akfreas/contentful.objc,akfreas/contentful.objc,akfreas/contentful.objc