Minor fixes: SPU, sys_mmapper, and cmd-line args.

* Some SPU instructions updated:
- Updated wrong instructions: SHLH, FRDS
- Added UNIMPLEMENTED warning to: HBR, HBRA, HBRR
* Updated sys_mmapper_allocate_memory declaration in SysCalls.h
* Added sceNp.cpp to project
* Added checkbox in the Settings menu for exiting RPCS3 when
sys_process_exit (SC_Process.cpp) is called. Unfortunately, due to some
problems, this checkbox doesn't have a real effect yet.

rpcs3/rpcs3.cpp

@@ -40,6 +40,9 @@ void Rpcs3App::OnArguments()
 
 	if (Rpcs3App::argc > 1)
 	{
+		// Force this value to be true
+		Ini.HLEExitOnStop.SetValue(true);
+
 		Emu.SetPath(argv[1]);
 		Emu.Load();
 		Emu.Run();