[llvm] PowerPC: Add baseline tests for more f128 libcall handling (PR #144381)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Jun 18, 4:19 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/144381).


https://github.com/llvm/llvm-project/pull/144381