Open Radar

 
Summary:
When using the Contacts framework on macOS, there are warning logs about CoreData dynamic accessors.

Steps to Reproduce:
Run this swift script on macOS 10.12:

```
import Contacts

let store = CNContactStore()
store.requestAccess(for: .contacts) { success, error in
    do {
        let request = CNContactFetchRequest(keysToFetch: [])
        try store.enumerateContacts(with: request) { _ in }
    } catch {}
}

dispatchMain()
```

With: `swift -target x86_64-macosx10.11 script.swift`

Expected Results:
No warning logs are printed

Actual Results:
You get multiple logs like this:

```
CoreData: warning: dynamic accessors failed to find @property implementation for 'uniqueId' for entity ABCDAddressBookSource while resolving selector 'uniqueId' on class 'ABCDAddressBookSource'.  Did you remember to declare it @dynamic or @synthesized in the @implementation ?
```

Version:
10.12 SDK

Notes:
You also see these logs with the older AddressBook framework on macOS as well. This log was not present on 10.11.

See https://github.com/keith/contacts-cli for another case of the log.