[cmake] Change WIN32 test to CMAKE_HOST_WIN32

The test is about what can be run on the host, not the cmake target.
When cross-compiling (compiler-rt at least) on Windows, we end up with
lit being unable to run llvm-lit because it can't find the llvm-lit
module.

llvm-svn: 335961
1 file changed
tree: 2c9d80eb5d05263c604a9c6a1340e699b9c8de92
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. README.md
README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.