indexer-fossology-license: Fix missing source to install deps
fossology-nomossa is in our repository.
This is not enough as it is currently only referenced for stretch and jessie in our debian repository.
root@pergamon:/srv/softwareheritage/repository# reprepro ls fossology-nomossa
fossology-nomossa | 3.1-1~bpo8~swh+1 | jessie | amd64
fossology-nomossa | 3.1-1~bpo9~swh+1 | stretch-swh | amd64
We need that dependency ported into buster-swh as well.
Still that can land independently as the status-quo is the same with or without. (The deps won't be seen until the repository is updated). Only difference is the manifest is one step closer to the truth with the diff.
Related to T3039
Migrated from D5057 (view on Phabricator)