Archive source package as well as binary packages

Change-Id: I069916f8ef0c119f7108bbac909fa2da3c795fbf
Save only last 20 builds (plus any pinned ones)

Change-Id: Ie59a24e3264380b72f1be3f4319a5808f0458fe5
Remove RepoSection parameter

Having this parameter is pointless if we don't do automatic uploads
to pso. Uploading to pso requires download of the packages to the
maintainer's machine, signing them and uploading to pso. Uploading
to llso-main can be done similarly, so there's no need for this
parameter.

Change-Id: I4e57905f1cf21edf1366530ce6ca392448bab58b
Upload source package

Change-Id: Id0ff1c6dc5862e4c2d394880bf5dc031e746e9c7