Add a script to build an update tarball

- A not so simple script that compares source versions in the local
repository with package versions in Apt.
- If a newer version is detected in the local repository, check to see
if git tags have been created in the source repo and debian repo for the package.
If so, invoke make to build the package.
- After building packages that are properly tagged and of newer
versions, generate a tarball containing only the files for those
packages, suitable for uploading to Apt.

Change-Id: Id208f3c2166f712dff35125694dda25e8aa507f6
5 files changed