Xdmf3 windows build issues
Fixes the following build error on Windows builds:
C:\bbd\6c27b535\source-paraview\VTK\ThirdParty\xdmf3\vtkxdmf3\XdmfGeometry.cpp(56):
error C2491: 'XdmfGeometry::ItemTag': definition of dllimport static data member not allowed