Switch Lit to directly query the driver for the builtin inclue path.
Thanks to Peter for pointing out how easy this is to do. I'm now much
happier with this solution.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143842 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed