Gcc warning fix (removed unnecessary const)

Author: fuzun

strobe/strobe-api.h

@@ -186,7 +186,7 @@ class StrobeAPI
 
 	int frameCount(CounterType type);
 
-	const char * const getDebugInformation(void);
+	const char * getDebugInformation(void);
 
 	virtual int getStrobeMode(void);
 	virtual int getPhaseSwitchInterval(void);

strobe/strobe-api_cpp_.h

@@ -67,7 +67,7 @@ inline void StrobeAPI::setPhaseSwitchInterval(int phaseSwitchInterval)
 	switchInterval = phaseSwitchInterval;
 }
 
-inline const char * const StrobeAPI::getDebugInformation(void)
+inline const char * StrobeAPI::getDebugInformation(void)
 {
 	generateDebugInformation();
 	return debugInformation;