Add a Jenkinsfile for automation of building artefacts for debian, ubuntu
and following distros.
Jenkins read a build.version file to determine version to build.

We don't just run `extras/packaging/build_package.sh -a` because this
would lead to running unverified shell script from unapproved commit
outside of docker isolation, directly on jenkins server.

Change-Id: I0482aa489272952755b88efefa0674175ca88cdd