enable brown out detection in rules-avr
enable brown out detection in rules-avr

This fixes the problem of boards losing their addresses

mct/soma,FlamingLotusGirls/soma,FlamingLotusGirls/soma,FlamingLotusGirls/soma,mct/soma,konkers/flg,mct/soma,mct/soma,FlamingLotusGirls/soma,mct/soma,FlamingLotusGirls/soma,FlamingLotusGirls/soma,FlamingLotusGirls/soma,konkers/flg,konkers/flg,mct/soma,mct/soma,konkers/flg