[compiler-rt] [compiler-rt] intercept macOs's freadlink call. (PR #83679)

[via llvm-commits]

zmodem wrote:

The lit test has been failing since it landed, see e.g. https://green.lab.llvm.org/job/llvm.org/job/clang-stage1-RA/2276/testReport/

I'll revert until this can be fixed.

https://github.com/llvm/llvm-project/pull/83679