contrib/tanglu: Update the buildd setup instructions to include the /dev/ptmx fix.
contrib/tanglu: Update the buildd setup instructions to include the /dev/ptmx fix.

lucaskanashiro/debile,opencollab/debile,lucaskanashiro/debile,tcc-unb-fga/debile,Debian/debile,mdimjasevic/debile,tanglu-org/debile,tanglu-org/debile,tcc-unb-fga/debile,mdimjasevic/debile,opencollab/debile,Debian/debile