Revert "Make test pass all of the Busybox tests"

This reverts commit 0e4e8f14d6be4cd816b195962658b9d8888b74b4.

The commit is broken as the following test shows:
```
~/rust/coreutils/build$ ./test " " -o "" -a "" && echo "success"
~/rust/coreutils/build$ test " " -o "" -a "" && echo "success" 
success
```
Please don't add broken functionality just to pass some tests.