Second Hirsute Hippo test rebuild

[Matthias Klose]

The second test rebuild of Hirsute Hippo was started on March 25 2021 for
all architectures, all components. The rebuild is finished for the main
component, it's still running for the other components.

Results (please also look at the superseded builds) can be found at

https://people.canonical.com/~doko/ftbfs-report/test-rebuild-20210325-hirsute-hirsute.html

Additional build failures for packages in hirsute-proposed (not yet in hirsute)
can be found at http://qa.ubuntuwire.com/ftbfs/

Please help fixing the build failures.

Happy Easter bug/egg hunt, Matthias