Code review comment for ~pointhi/kicad:wx-python

It doesn't build on msys2 when python 3 is enabled. It finds the python 3 interpreter without any issue but it fails finding the python3 library path. Here is the config error:

-- Found PythonInterp: C:/msys64/mingw64/bin/python3.exe (found suitable version "3.7.1", minimum required is "3.3")
-- Check for installed Python Interpreter -- found
-- Python module install path: lib/python3.7/site-packages
CMake Error at C:/msys64/mingw64/share/cmake-3.12/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find PythonLibs (missing: PYTHON_INCLUDE_DIRS) (Required is at
  least version "3.3")
Call Stack (most recent call first):
  C:/msys64/mingw64/share/cmake-3.12/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  CMakeModules/FindPythonLibs.cmake:233 (find_package_handle_standard_args)
  CMakeLists.txt:750 (find_package)

-- Configuring incomplete, errors occurred!