message: TFLu: Suppress compiler error for generated segfault
  Suppress -Wnull-dereference for both Armclang and GCC, when
  intentionally generating a segfault in patched code.
diff: @@ -54,7 +54,9 @@ function patch_to_avoid_strtod() {
  echo "#if 1" >> ${temp_flexbuffers_path}
  echo " // TODO(b/173239141): Patched via micro/tools/make/flexbuffers_download.sh" >> ${temp_flexbuffers_path}
  echo " // Introduce a segfault for an unsupported code path for TFLM." >> ${temp_flexbuffers_path}
  + echo "#pragma GCC diagnostic ignored \"-Wnull-dereference\"" >> ${temp_flexbuffers_path}
  echo " return *(static_cast<double*>(nullptr));" >> ${temp_flexbuffers_path}
  + echo "#pragma GCC diagnostic error \"-Wnull-dereference\"" >> ${temp_flexbuffers_path}
  echo "#else" >> ${temp_flexbuffers_path}
  echo " // This is the original code" >> ${temp_flexbuffers_path}
  sed -n -e $((${string_to_num_line} - 1)),$((${string_to_num_line} + 1))p ${input_flexbuffers_path} >> ${temp_flexbuffers_path}
  