Change cerr to cout in PrintHelpText again

src/google/protobuf/compiler/command_line_interface.cc

@@ -1814,7 +1814,7 @@ void CommandLineInterface::PrintHelpText() {
               << string(19 - iter->first.size(), ' ')  // Spaces for alignment.
               << iter->second.help_text << std::endl;
   }
-  std::cerr <<
+  std::cout <<
 "  @<filename>                 Read options and filenames from file. If a\n"
 "                              relative file path is specified, the file\n"
 "                              will be searched in the working directory.\n"