Merge branch 'upstream-libharu' into eeloo-compile-fix

ThirdParty/libharu/vtklibharu/CMakeLists.txt

ThirdParty/libharu/vtklibharu/README.kitware.md

ThirdParty/libharu/vtklibharu/include/hpdf.h

ThirdParty/libharu/vtklibharu/include/hpdf_error.h

ThirdParty/libharu/vtklibharu/include/hpdf_objects.h

ThirdParty/libharu/vtklibharu/include/hpdf_pages.h

ThirdParty/libharu/vtklibharu/include/hpdf_types.h

ThirdParty/libharu/vtklibharu/include/vtk_haru_mangle.h

ThirdParty/libharu/vtklibharu/src/CMakeLists.txt

ThirdParty/libharu/vtklibharu/src/hpdf_page_operator.c

ThirdParty/libharu/vtklibharu/src/hpdf_pages.c

ThirdParty/libharu/vtklibharu/src/hpdf_shading.c