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

[Cron Daemon]

'experimental/master.log' -> 'experimental/master.20180616.log'
'stretch2buster/master.log' -> 'stretch2buster/master.20180616.log'
jessie2stretch/master.20180615.log: 34.1 KiB / 1048.7 KiB = 0.032
'squeeze2wheezy/master.log' -> 'squeeze2wheezy/master.20180616.log'
'squeeze2bpo2wheezy/master.log' -> 'squeeze2bpo2wheezy/master.20180616.log'