AP_HAL_Empty: Stub out new Scheduler methods

libraries/AP_HAL_Empty/Scheduler.cpp

@@ -42,12 +42,23 @@ void EmptyScheduler::suspend_timer_procs()
 void EmptyScheduler::resume_timer_procs()
 {}
 
+bool EmptyScheduler::in_timerprocess() {
+    return false;
+}
+
 void EmptyScheduler::begin_atomic()
 {}
 
 void EmptyScheduler::end_atomic()
 {}
 
+bool EmptyScheduler::system_initializing() {
+    return false;
+}
+
+void EmptyScheduler::system_initialized()
+{}
+
 void EmptyScheduler::panic(const prog_char_t *errormsg) {
     hal.console->println_P(errormsg);
     for(;;);

libraries/AP_HAL_Empty/Scheduler.h

@@ -14,15 +14,22 @@ public:
     void     delay_microseconds(uint16_t us);
     void     register_delay_callback(AP_HAL::Proc,
                 uint16_t min_time_ms);
+
     void     register_timer_process(AP_HAL::TimedProc);
-    void     register_timer_failsafe(AP_HAL::TimedProc,
-                uint32_t period_us);
     void     suspend_timer_procs();
     void     resume_timer_procs();
 
+    bool     in_timerprocess();
+
+    void     register_timer_failsafe(AP_HAL::TimedProc,
+                uint32_t period_us);
+
     void     begin_atomic();
     void     end_atomic();
 
+    bool     system_initializing();
+    void     system_initialized();
+
     void     panic(const prog_char_t *errormsg);
     void     reboot();