[llvm] [DWARFLinker] Update `stmt-seq-macho.test` to use `update_test_body.py` (PR #133363)

[Ulrich Weigand via llvm-commits]

uweigand wrote:

As of this change, the `stmt-seq-macho.test` is failing on s390x: https://lab.llvm.org/buildbot/#/builders/42/builds/4155

Maybe an endian issue that got exposed by the more extensive testing?

https://github.com/llvm/llvm-project/pull/133363