[lit] Always list individual UNRESOLVED tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187933 91177308-0d34-0410-b5e6-96231b3b80d8
[lit] Remove unnecessary list copy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187934 91177308-0d34-0410-b5e6-96231b3b80d8