When using the --stop-on-failure argument, print contents of log file for failed build to the console
I like the idea, it even used to be in the very old versions of kdecvs-build. I had taken it out because the error formats had changed too much (and kdecvs-build was still meant to be run from
cron back in the day!). But the format is stable and most kdesrc-build usages are interactive now.