Add testing stuff to CMake documents.

  - Note "GnuWin32".
  - Note LLVM_LIT_TOOLS_DIR
  - Now we can run tests on VS w/e all tests might pass or not!

llvm-svn: 125177
2 files changed
tree: 333f92f312ee0119fc2d8c585f50a99644b58403
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. lldb/
  6. llvm/