message: Make sure eosio_build.sh script checks recursive submodules
diff: pushd "${SOURCE_DIR}" &> /dev/null
  - STALE_SUBMODS=$(( $(git submodule status | grep -c "^[+\-]") ))
  + STALE_SUBMODS=$(( $(git submodule status --recursive | grep -c "^[+\-]") ))
  if [ $STALE_SUBMODS -gt 0 ]; then
  printf "\\n\\tgit submodules are not up to date.\\n"
  printf "\\tPlease run the command 'git submodule update --init --recursive'.\\n"
  