[Bug-tar] Please, compress the logs

[Antonio Diaz Diaz]

Please, compress the logs. It saves 96% of bandwidth:

-rw-r--r-- 1 982019 2019-01-04 01:23 testsuite.log
-rw-r--r-- 1  39912 2019-01-04 01:23 testsuite.log.lz


Thanks,
Antonio.