Begin a custom list of errnos for atmel-samd
Begin a custom list of errnos for atmel-samd

The uerrno module was written to allow boards to customize the list of
errnos they can raise.  Start by copying the default list.

adafruit/circuitpython,adafruit/micropython,adafruit/micropython,adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython