cmake _HAVE_LSEEK64 examples

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :281 

CHECK_FUNCTION_EXISTS (lseek64            ${HDF_PREFIX}_HAVE_LSEEK64)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :326 

CHECK_FUNCTION_EXISTS (lseek64            ${HDF_PREFIX}_HAVE_LSEEK64)