cmake _HAVE_SIGLONGJMP examples

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :453 

CHECK_FUNCTION_EXISTS (siglongjmp        ${HDF_PREFIX}_HAVE_SIGLONGJMP)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :516 

CHECK_FUNCTION_EXISTS (siglongjmp        ${HDF_PREFIX}_HAVE_SIGLONGJMP)