Fix distutils.test_get_python_inc on windows copying headers into build dir
Fix distutils.test_get_python_inc on windows copying headers into build dir

python-cmake-buildsystem/python-cmake-buildsystem,jcfr/python-cmake-buildsystem,thewtex/python-cmake-buildsystem,adrianbroher/python-cmake-buildsystem,thewtex/python-cmake-buildsystem,chuckatkins/python-cmake-buildsystem,davidsansome/python-cmake-buildsystem