[llvm] llvm-reduce: Add values to return reduction (PR #132686)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **May 2, 10:06 AM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/132686).


https://github.com/llvm/llvm-project/pull/132686