cmake _HAVE_SETSYSINFO examples

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :451 

CHECK_FUNCTION_EXISTS (setsysinfo        ${HDF_PREFIX}_HAVE_SETSYSINFO)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :511 

CHECK_FUNCTION_EXISTS (setsysinfo        ${HDF_PREFIX}_HAVE_SETSYSINFO)