Bug#913099: lintian: autopkgtests fail on !(amd64)

tags 913099 + pending thanks Merged https://salsa.debian.org/lintian/lintian/merge_requests/71 into Git, pending upload: https://salsa.debian.org/lintian/lintian/commit/4326d7d416d482bbda7ae550097b2e2ac297d416 debian/changelog | 2 ++

Bug#913099: lintian: autopkgtests fail on !(amd64)

I looked into the failure mentioned in this bug (as well as two other failures on !amd64), and committed the following patch in Ubuntu, which solves all outstanding issues and gets autopkgtests passing on all six of our architectures again: