[llvm] [DebugInfo] Handle followup loop metadata in updateLoopMetadataDebugLocations (PR #157557)

[Michael Kruse via llvm-commits]

================
@@ -375,6 +375,32 @@ bool DebugInfoFinder::addScope(DIScope *Scope) {
   return true;
 }
 
+// Recursively handle DILocations in followup metadata etc.
----------------
Meinersbur wrote:

```suggestion
/// Recursively handle DILocations in followup metadata etc.
```
[nit] doxygen comment for global function documentation

https://github.com/llvm/llvm-project/pull/157557