fixed flash_firmware.py

Author: gbr1

examples/flash_firmware.py

@@ -1,5 +1,10 @@
 # from machine import reset
 from arduino_alvik import update_firmware
 
+# this is a patch to fix possible running threads on Alvik
+from arduino_alvik import ArduinoAlvik
+alvik = ArduinoAlvik()
+alvik.stop()
+
 update_firmware('./firmware.bin')
-# reset()
+# reset()