third_party {
  license_note: "would be NOTICE save for GPL in:\n"
  "   common/bison/... see:\n"
  "     common/bison/README.md\n"
  "     common/bison/NOTICE\n"
  "     plus copyright headers\n"
  "   .../bin/make\n"
  "   .../bin/m4"
  license_type: RESTRICTED
}