jenkins: logrotate access.log

Jenkins does not automatically logrotate its access log. One has to rely
on logrotate to do so.  The Debian package provided by upstream does not
include the script so I just copy pasted it and amended the filename to
match our own configuration.

A bug got filled upstream to have the logrotate script included in
Debian package:
https://issues.jenkins-ci.org/browse/JENKINS-18870

daily explicitly set
rotate and maxage set to 30

Change-Id: Iee3495be6ebf812478da83470053512d1fc0587a