Since 80fc9fabc66a0bc767467fa14c703e5a9f340cd3 the format of the
`flash list` command changed to a more human readable multi-line
variant. Technically, the change is white-space only. Still, the
current approach of parsing them with awk, sed and cut doesn't like
the new multi-line format. The parsing is now delegated into a
python script that is compatible across OpenOCD versions.
