self when initialising property with function, inheriting from NSObject

code.swift

Found a bug in my code because of something very subtle:

```
class C: NSObject {
	var foo: String = {
		NSLog("non-lazy self: \(self)")
		return ""
	}()
	lazy var bar: String = {
		NSLog("lazy self: \(self)")
		return ""
	}()
}
let c = C()
let _ = c.bar
```

prints:

```
2020-04-11 13:38:50.989 Untitled 2[98985:8257392] non-lazy self: (Function)
2020-04-11 13:38:50.989 Untitled 2[98985:8257392] lazy self: <main.C: 0x7fe0b6d02ae0>
```

Bonus, code doesn't compile if C doesn't inherit from NSObject (so reproducible by replacing NSObject with say UIViewController). I encountered this because I had `foo` which calls `addTarget(_:action:)` with `self as the target`