[lit] Work around Windows MSys command line tokenization bug

Summary:
This will allow us to revert LLD r284768, which added spaces to get MSys
echo to print what we want.

Reviewers: ruiu, inglorion, rafael

Subscribers: modocache, llvm-commits

Differential Revision: https://reviews.llvm.org/D26009

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285237 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed