[Qa-jenkins-scm] reproducible-env-changes.log found

[jenkins at jenkins.debian.net]

A few entries per day are normal, a few dozens or hundreds probably not.

Thu Dec  3 01:10:00 UTC 2015 - https://jenkins.debian.net/job/reproducible_builder_amd64_26/9515/console encountered a problem: different packages were installed in the 1st+2nd builds and also in the 2nd+3rd build.
-rw-r--r-- 1 jenkins jenkins 5148 Dec  3 01:10 ./b1/postbooks-schema-quickstart_4.9.2-1_amd64.buildinfo on profitbricks-build2-amd64.debian.net
-rw-r--r-- 1 jenkins jenkins 4509 Dec  3 01:09 ./b2/postbooks-schema-quickstart_4.9.2-1_amd64.buildinfo on profitbricks-build6-amd64.debian.net