Do not avoid hash modules with OpenSSL on Windows.
Do not avoid hash modules with OpenSSL on Windows.

OpenSSL does not appear to provide them (at least in a usable way),
so build the md5 and sha modules if requested.

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