add _mcci_arduino_version and related macros

[terrillmoore]

We need the common MCCI Arduino version macro, reflecting the MCCI Arduino BSP version number, in Arduino.h, around here:

ArduinoCore-samd/cores/arduino/Arduino.h

Lines 20 to 23 in 35d285e

	#ifndef Arduino_h
	#define Arduino_h
	#include <stdbool.h>