Add another platform path (for newer arduinos?)

Author: Lucas Baudin

cmake/Platform/Arduino.cmake

@@ -2136,6 +2136,7 @@ set(ARDUINO_AVRDUDE_FLAGS -V                              CACHE STRING "")
 #=============================================================================#
 if(NOT ARDUINO_FOUND AND ARDUINO_SDK_PATH)
     register_hardware_platform(${ARDUINO_SDK_PATH}/hardware/arduino/)
+    register_hardware_platform(${ARDUINO_SDK_PATH}/hardware/arduino/avr)
 
     find_file(ARDUINO_LIBRARIES_PATH
         NAMES libraries