Pbuilder tweaks, and first set of packages

- Move the bind mount of $ROOTDIR in docker to /rootdir. Pbuilder uses
/build as its directory, and mounting over that doesn't seem like the
best idea.
- As part of the make-pbuilder-package-target, append the target name to
a list of targets. That list gets added to the packages target
- Add another argument to make-pbuilder-package-target, that points to
the source repository. This folder, as well as the debian metadata will
be staged in a different directory, where pdebuild runs. This gives
clean source packages that can be rebuilt outside of our source tree.

Change-Id: I38a1d75bdb3f15660a391c13d7a6b912ce66e774
3 files changed