system/core: using equivalent code to fix build break for win host

    if (ret_difference >= 5) {

        // Log the difference between new and old calculation. A high number, or equal numbers

        // appearing frequently, would be indicative of an attack.

        std::string logged_string = (std::ostringstream() << ret_difference).str();

        std::ostringstream logged_string_stream;

        logged_string_stream << ret_difference;

        std::string logged_string = logged_string_stream.str();

        android_errorWriteWithInfoLog(0x534e4554, "29250543", -1 /* int_uid */,

            logged_string.c_str(), logged_string.length() + 1);

    }