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

[Cron Daemon]

'stretch2buster-rcmd/master.log' -> 'stretch2buster-rcmd/master.20180322.log'
'stretch2bpo/master.log' -> 'stretch2bpo/master.20180322.log'
squeeze2bpo2wheezy/master.20180321.log: 49.3 KiB / 1094.4 KiB = 0.045