[llvm] [llvm-ar] Enable failed testacase on FreeBSD (PR #192612)

[via llvm-commits]

aokblast wrote:

> What version of FreeBSD is the minimum supported for building LLVM? As far as I can see, this change is only valid if the minimum supported FreeBSD is v13 or greater. From the nature of the comment, it's clear that it was known that the change that allows the test to pass occurs in FreeBSD 13, so at the time this comment was introduced, it's clear that we needed to care about v12 and older.

FreeBSD 12 has reached end-of-life, so we no longer need to account for it. The LLVM CI infrastructure is already using FreeBSD 13 for testing.

There have been previous attempts to introduce version checks in LLVM (e.g., using _FreeBSD_version >= 13000), but these approaches were ultimately rejected by the maintainers.

https://github.com/llvm/llvm-project/pull/192612