Fix Wordcount unit test for Xcode 6 beta 4
Fix Wordcount unit test for Xcode 6 beta 4

Fix for issue https://github.com/exercism/xswift/issues/4

masters3d/xswift,masters3d/xswift,exercism/xswift,masters3d/xswift,robtimp/xswift,exercism/xswift,robtimp/xswift,exercism/xswift,robtimp/xswift