Add assistant files to xcode project (not target) (#4578)
Add assistant files to xcode project (not target) (#4578)

make them available to Xcode editor

Co-authored-by: liming.song（嘶吼） <6dd78ffd1111a683c62d3d6773b349a07d47614f@slims-MacBook-Pro-13.local>
AFNetworking/AFNetworking,AFNetworking/AFNetworking,AFNetworking/AFNetworking