cmake H5_HAVE_FILTER_FLETCHER32 examples

szcom/rnnlib hdf5_snap/tools/h5dump/CMakeTests.cmake :1343 

endif (H5_HAVE_FILTER_FLETCHER32)

szcom/rnnlib hdf5_snap/tools/h5repack/CMakeTests.cmake :658 

endif (H5_HAVE_FILTER_FLETCHER32)