[lit] Synthesize artificial deadline

We always want to use a deadline when calling `result.await`.  Let's
synthesize an artificial deadline (positive infinity) to simplify code
and do less busy waiting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375129 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed