Merge branch 'beat-support' into 'master'

Add support for packages required to run linux builds on docker-build hosts

See merge request !20

bob/devtools/data/gitlab-ci/beat-docker-package.yaml

+include: 'https://gitlab.idiap.ch/bob/bob.devtools/raw/master/bob/devtools/data/gitlab-ci/single-package.yaml'
+
+build_linux_36:
+  tags:
+    - docker-build