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

[Cron Daemon]

buster/master.20180510.log: 94.9 KiB / 1041.7 KiB = 0.091
'stretch2bpo/master.log' -> 'stretch2bpo/master.20180511.log'
jessie2Xstretch-rcmd/master.20180510.log: 42.0 KiB / 1029.6 KiB = 0.041