[libc-commits] [libc] [libc][test] make `str_to_float_comparison_test` independent of C++ headers. (PR #133978)

[Mikhail R. Gadelha via libc-commits]

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

Couple of nits, otherwise it's okay.

https://github.com/llvm/llvm-project/pull/133978