TestExitDuringExpression test_exit_before_one_thread_unwind fails
sporadically on arm/linux. This seems like a thread timing issue.
I am marking it skip for now.
After this patch all remaining tests should pass on macOS when replayed
from a reproducer.
To capture the reproducers:
./bin/llvm-lit ../llvm-project/lldb/test/ --param lldb-run-with-repro=capture
To replay the reproducers:
./bin/llvm-lit ../llvm-project/lldb/test/ --param lldb-run-with-repro=replay
