Fix spark build error around get_millisecond_timer
Fix spark build error around get_millisecond_timer

lessavyfav/fastLED-muck,eklex/FastLED-Sparkcore,lessavyfav/fastLED-muck,eklex/FastLED-Sparkcore,jasoncoon/FastLED-Sparkcore,focalintent/FastLED-Sparkcore,focalintent/FastLED-Sparkcore,jasoncoon/FastLED-Sparkcore