Services: Added some missing services.

cfg:s, ptm:sysm, apt:s.
apt:s is almost exactly the same as apt:u as per 3dbrew

src/core/hle/service/apt_s.h

@@ -0,0 +1,30 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Namespace APT_S
+
+namespace APT_S {
+
+// Application and title launching service. These services handle signaling for home/power button as
+// well. Only one session for either APT service can be open at a time, normally processes close the
+// service handle immediately once finished using the service. The commands for APT:U and APT:S are
+// exactly the same, however certain commands are only accessible with APT:S(NS module will call
+// svcBreak when the command isn't accessible). See http://3dbrew.org/wiki/NS#APT_Services.
+
+/// Interface to "APT:S" service
+class Interface : public Service::Interface {
+public:
+    Interface();
+
+    std::string GetPortName() const override {
+        return "APT:S";
+    }
+};
+
+} // namespace