message: [vcpkg] Add additional debug messages
diff: @@ -142,6 +142,7 @@ namespace vcpkg::System
  const std::wstring& actual_cmd_line = Strings::wformat(LR"###("%s 2>&1")###", cmd_line);
  + Debug::println("_wpopen(%s)", Strings::to_utf8(actual_cmd_line));
  std::string output;
  char buf[1024];
  auto pipe = _wpopen(actual_cmd_line.c_str(), L"r");
  @@ -158,6 +159,7 @@ namespace vcpkg::System
  return {1, output};
  }
  auto ec = _pclose(pipe);
  + Debug::println("_wpopen() returned %d", ec);
  return {ec, output};
  }
  