message: Install failure signal handler
  Print backtrace to stderr after getting fatal signal like sigsegv.
diff: @@ -55,6 +55,7 @@ std::vector<char*> InitCommandLine(
  absl::SetFlagsUsageConfig(usage_config);
  absl::SetProgramUsageMessage(usage); // copies usage string
  google::InitGoogleLogging(**argv);
  + google::InstallFailureSignalHandler();
  return absl::ParseCommandLine(*argc, *argv);
  }
  