[Qa-jenkins-scm] reproducible-race-conditions.log found

[jenkins at jenkins.debian.net]

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

Fri Nov  6 12:15:45 UTC 2015 - Warning, package python-django-compressor (id=16107) in unstable on amd64 is probably already building at amd64_17/5144, while this is https://jenkins.debian.net/job/reproducible_builder_amd64_24/4882/.