When a CU attaches some ranges for a subprogram or an inlined code, the CU should be that of the subprogram/inlined code that was emitted.
If not, then these emitted ranges will use the incorrect base of the CU in `emitRangeList`.
A reproducible example is:
When linking these two LLVM IRs, dsymutil will report no mapping for range or inconsistent range data warnings.
`foo.swift`
```swift
import AppKit.NSLayoutConstraint
public class Foo {
public var c: Int {
get {
Int(NSLayoutConstraint().constant)
}
set {
}
}
}
```
`main.swift`
```swift
// no mapping for range
let f: Foo! = nil
// inconsistent range data
//let l: Foo = Foo()
```
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D136039
DianQK