[neon/backports-focal/libavif/Neon/release] /: Merge branch 'lintian-fixes' into 'master'

[Boyuan Yang]

Git commit 56855326d3799713bffc69d9fb6fe4aa8ec875e8 by Boyuan Yang.
Committed on 05/10/2021 at 14:27.
Pushed by jriddell into branch 'Neon/release'.

Merge branch 'lintian-fixes' into 'master'

Fix some issues reported by lintian

See merge request multimedia-team/libavif!1


https://invent.kde.org/neon/backports-focal/libavif/commit/56855326d3799713bffc69d9fb6fe4aa8ec875e8