Fix more race conditions if you exit during game bootup

Core/System.cpp

@@ -636,6 +636,9 @@ bool PSP_InitStart(const CoreParameter &coreParam) {
 			}
 		}
 
+		// Use this to test exit-during-boot and other exceptional cases.
+		// sleep_ms(6000, "test");
+
 		g_CoreParameter.fileType = fileType;
 
 		// TODO: The reason we pass in g_CoreParameter.errorString here is that it's persistent -