Fix KillTheDoctor after r210725.

We don't map these windows errors to generic ones since errc::timed_out is
not defined on mingw. Just use the raw windows error value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210910 91177308-0d34-0410-b5e6-96231b3b80d8