message: `cchost --version` reports target platform
diff: @@ -48,6 +48,16 @@ std::chrono::microseconds asynchost::TimeBoundLogger::default_max_time(10'000);
  void print_version(size_t)
  {
  std::cout << "CCF host: " << ccf::ccf_version << std::endl;
  + std::cout << "Platform: "
  + <<
  +#if defined(PLATFORM_SGX)
  + "SGX"
  +#elif defined(PLATFORM_SNP)
  + "SNP"
  +#elif defined(PLATFORM_VIRTUAL)
  + "Virtual"
  +#endif
  + << std::endl;
  exit(0);
  }
  