Python version check failed

Hi,

I'm on debian buster, using cmake 3.9.5. I have libPython2.7-dev installed.

In https://gitlab.kitware.com/paraview/common-superbuild/blob/master/projects/python.system.cmake ) there's a sanity check to ensure that PYTHON_VERSION_STRING is equal to PYTHONLIBS_VERSION_STRING. But here it is not the case for me: PYTHON_VERSION_STRING=2.7.14 and PYTHONLIBS_VERSION_STRING=2.7.14+ and config fails.

The + come from patchlevel.h provided by my python package.