cmake C_HAVE_QUADMATH examples

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :129 

CHECK_INCLUDE_FILES(quadmath.h C_HAVE_QUADMATH)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :173 

CHECK_INCLUDE_FILES(quadmath.h C_HAVE_QUADMATH)