time: Add missing time:s functions, used for libnx

src/core/hle/service/time/time_s.cpp

@@ -10,6 +10,10 @@ namespace Time {
 TIME_S::TIME_S(std::shared_ptr<Module> time) : Module::Interface(std::move(time), "time:s") {
     static const FunctionInfo functions[] = {
         {0, &TIME_S::GetStandardUserSystemClock, "GetStandardUserSystemClock"},
+        {1, &TIME_S::GetStandardNetworkSystemClock, "GetStandardNetworkSystemClock"},
+        {2, &TIME_S::GetStandardSteadyClock, "GetStandardSteadyClock"},
+        {3, &TIME_S::GetTimeZoneService, "GetTimeZoneService"},
+        {4, &TIME_S::GetStandardLocalSystemClock, "GetStandardLocalSystemClock"},
     };
     RegisterHandlers(functions);
 }