message: Update clang_arg on windows
diff: -IC:/Users/jacob/Desktop/superindex/indexer/third_party/rapidjson/include
  -IC:/Users/jacob/Desktop/superindex/indexer/third_party/sparsepp
  -IC:/Program Files/LLVM/include
  +-isystemC:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.10.25017/include
  +-isystemC:/Program Files (x86)/Windows Kits/10/Include/10.0.15063.0/ucrt
  # OSX
  