Request VID/PID for SnekBoard

[keith-packard]

Pull request #2018 adds support for SnekBoard, which is a SAMD21G18A board with 9V motor controllers for use with Lego Power Functions motors and sensors. I'll need a 'real' USB VID/PID before this pull request should be merged.

[ladyada]

Here ya go!

Keith P Snek      VID 0x239A    PID 0x004D  # bootloader
                                PID 0x804D  # arduino
                                PID 0x804E  # circuitpython

[keith-packard]

Thanks so much! I've updated the code, and also submitted a pull request for the uf2 bootloader project adafruit/uf2-samdx1#78.