[compiler-rt] [compiler-rt] Fix some tests to work with lit internal shell. (PR #160728)

[via llvm-commits]

dyung wrote:

Hi @cmtice, just in case you were not notified, I suspect your change is causing a failure on one of the build bots. Can you take a look and revert if you need time to investigate?

https://lab.llvm.org/buildbot/#/builders/174/builds/25130

https://github.com/llvm/llvm-project/pull/160728