[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.

Sun Dec  6 00:09:22 UTC 2015 - https://jenkins.debian.net/job/reproducible_builder_amd64_24/9151/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 4618 Dec  6 00:09 ./b1/vftool_2.0alpha-4.1_amd64.buildinfo on profitbricks-build6-amd64.debian.net
-rw-r--r-- 1 jenkins jenkins 4618 Dec  6 00:08 ./b2/vftool_2.0alpha-4.1_amd64.buildinfo on profitbricks-build1-amd64.debian.net