Comment 21 for bug 1970674

Running Lintian on the changes file for Ubuntu 22.04 (amd64) reports the following warnings:

W: ffmpeg-dbgsym: elf-error In program headers: Unable to find program interpreter name [usr/lib/debug/.build-id/01/31a3a53a5037d9cfce0b08e65bdf645b5fc6a6.debug]
W: ffmpeg-dbgsym: elf-error In program headers: Unable to find program interpreter name [usr/lib/debug/.build-id/11/d6ba1af19b58684bb4d9ec94ce27e8875a9a86.debug]
W: ffmpeg-dbgsym: elf-error In program headers: Unable to find program interpreter name [usr/lib/debug/.build-id/ca/9a440e0e634449b6d5c328fbc4868d4d3ff142.debug]
W: ffmpeg-dbgsym: elf-error In program headers: Unable to find program interpreter name [usr/lib/debug/.build-id/d8/68041f35b67ed9d73e571b7e178cafffac394d.debug]
W: ffmpeg source: orig-tarball-missing-upstream-signature ffmpeg_4.4.2.orig.tar.xz

The last warning can be fixed with the signature in comment 17.