Fix build.

Author: Mysticial

SerialPrograms/Source/CommonFramework/Environment/SystemSleep.h

@@ -55,7 +55,7 @@ class SystemSleepController{
 public:
     static SystemSleepController& instance();
 
-    virtual void stop() = 0;
+    virtual void stop(){}
 
     SleepSuppress current_state() const;