[llvm] r309310 - Un-revert "Teach the CMake build system to run lit's test suite. These can be run"

[Brian Gesiak via llvm-commits]

Hi Victor,

It would be really great to fix this forward, to ensure the lit test
suite continues being executed and continues to pass on (most)
buildbots.

I don't use Visual Studio regularly, so I don't know how it makes use
of the "$(Configuration)" string. However one hacky solution would be
to, from within the llvm\utils\lit\tests\lit.cfg, simply replace any
instances of "$(Configuration)" with, as you suggested,
CMAKE_BUILD_TYPE. I'll get this working locally and send a diff,
hopefully tonight.

- Brian