On windows, do not pass PLAFORM to 'getplatform.c' - value hardcoded in pyconfig.h
On windows, do not pass PLAFORM to 'getplatform.c' - value hardcoded in pyconfig.h

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