ev3dev-stretch: breaking kernel change: brickpi port prefix change

[dlech]

In the ev3dev-2.0.0 kernel release (currently uploading), there has been a change in the brickpi driver that resulted in the prefix being changed from ttyAMA0 to serial0-0.

[dlech]

Fix released in v1.2.0

[WasabiFan]

Released in the v2 beta as well. Closing.