AP_Scheduler: resolve debug name conflict

libraries/AP_Scheduler/AP_Scheduler.cpp

@@ -244,7 +244,7 @@ void AP_Scheduler::loop()
 
 void AP_Scheduler::update_logging(const bool log_to_dataflash)
 {
-    if (debug()) {
+    if (debug_flags()) {
         perf_info.update_logging();
     }
     if (log_to_dataflash) {

libraries/AP_Scheduler/AP_Scheduler.h

@@ -99,7 +99,7 @@ public:
     uint16_t time_available_usec(void);
 
     // return debug parameter
-    uint8_t debug(void) { return _debug; }
+    uint8_t debug_flags(void) { return _debug; }
 
     // return load average, as a number between 0 and 1. 1 means
     // 100% load. Calculated from how much spare time we have at the