[Piuparts-reports] Cron <piupartsm at pejacevic> rotate_master_logs

[Cron Daemon]

'sid/master.log' -> 'sid/master.20180606.log'
'sid-nodoc/master.log' -> 'sid-nodoc/master.20180606.log'
'stretch2proposed/master.log' -> 'stretch2proposed/master.20180606.log'
'squeeze2wheezy/master.log' -> 'squeeze2wheezy/master.20180606.log'