message: Add public abi override into the private abi
diff: @@ -675,6 +675,15 @@ namespace vcpkg::Build
  const std::string features = Strings::join(";", config.feature_list);
  abi_tag_entries.emplace_back(AbiEntry{"features", features});
  + if (pre_build_info.public_abi_override)
  + {
  + abi_tag_entries.emplace_back(
  + AbiEntry{
  + "public_abi_override",
  + pre_build_info.public_abi_override.value_or_exit(VCPKG_LINE_INFO)
  + });
  + }
  +
  if (config.build_package_options.use_head_version == UseHeadVersion::YES)
  abi_tag_entries.emplace_back(AbiEntry{"head", ""});
  