CMake: LLVM_LIT_TOOLS_DIR is needed only on Win32 hosts to use GnuWin32 tools.

Unixen and Cygwin do not need it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125277 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed