Debugger: Fix game.reset by adding a reboot status.

We don't want EmuScreen to auto-exit, and we don't want to double-lock the
debugger lifecycle lock.  Let's just handle reboot specifically.

Core/System.cpp

@@ -114,6 +114,7 @@ static std::string gpuBackendDevice;
 static volatile bool pspIsInited = false;
 static volatile bool pspIsIniting = false;
 static volatile bool pspIsQuitting = false;
+static volatile bool pspIsRebooting = false;
 
 void ResetUIState() {
 	globalUIState = UISTATE_MENU;
@@ -448,6 +449,7 @@ bool PSP_InitStart(const CoreParameter &coreParam, std::string *error_string) {
 	bool success = !g_CoreParameter.fileToStart.empty();
 	if (!success) {
 		Core_NotifyLifecycle(CoreLifecycle::START_COMPLETE);
+		pspIsRebooting = false;
 		// In this case, we must call shutdown since the caller won't know to.
 		// It must've partially started since CPU_Init returned true.
 		PSP_Shutdown();
@@ -475,6 +477,7 @@ bool PSP_InitUpdate(std::string *error_string) {
 		}
 	}
 	if (!success) {
+		pspIsRebooting = false;
 		PSP_Shutdown();
 		return true;
 	}
@@ -483,6 +486,7 @@ bool PSP_InitUpdate(std::string *error_string) {
 	pspIsIniting = !pspIsInited;
 	if (pspIsInited) {
 		Core_NotifyLifecycle(CoreLifecycle::START_COMPLETE);
+		pspIsRebooting = false;
 	}
 	return pspIsInited;
 }
@@ -501,7 +505,11 @@ bool PSP_IsIniting() {
 }
 
 bool PSP_IsInited() {
-	return pspIsInited && !pspIsQuitting;
+	return pspIsInited && !pspIsQuitting && !pspIsRebooting;
+}
+
+bool PSP_IsRebooting() {
+	return pspIsRebooting;
 }
 
 bool PSP_IsQuitting() {
@@ -515,7 +523,7 @@ void PSP_Shutdown() {
 	}
 
 	// Make sure things know right away that PSP memory, etc. is going away.
-	pspIsQuitting = true;
+	pspIsQuitting = !pspIsRebooting;
 	if (coreState == CORE_RUNNING)
 		Core_Stop();
 
@@ -540,6 +548,18 @@ void PSP_Shutdown() {
 	Core_NotifyLifecycle(CoreLifecycle::STOPPED);
 }
 
+bool PSP_Reboot(std::string *error_string) {
+	if (!pspIsInited || pspIsQuitting)
+		return false;
+
+	pspIsRebooting = true;
+	Core_Stop();
+	Core_WaitInactive();
+	PSP_Shutdown();
+	std::string resetError;
+	return PSP_Init(PSP_CoreParameter(), error_string);
+}
+
 void PSP_BeginHostFrame() {
 	// Reapply the graphics state of the PSP
 	if (gpu) {