[flang-commits] [flang] [flang] Modify lto testcase for AIX (PR #74496)

[Leandro Lupori via flang-commits]

https://github.com/luporl requested changes to this pull request.

This patch breaks the `lto-flags` test on Darwin. Please check the suggested change.
Also note that I have tested the change on Darwin only.

https://github.com/llvm/llvm-project/pull/74496