[compiler-rt] [Compiler-rt][test] Fix circular link dependency between builtins and libc (PR #199482)

[David Tenty via llvm-commits]

daltenty wrote:

This patch breaks the build in test on AIX, as our linker does not have such options.
https://lab.llvm.org/staging/#/builders/231/builds/1418/steps/10/logs/FAIL__Builtins-powerpc64-aix___umodti3_test_c

https://github.com/llvm/llvm-project/pull/199482