lomiri-push-service fails to build on s390x; it has always failed to
build there on Debian because of an old failing build test. I don't
know if this is a big-endian issue.

https://buildd.debian.org/status/package.php?p=lomiri-push-service

Some additional details are at the upstream issue:
https://gitlab.com/ubports/development/core/lomiri-push-service/-/work_items/53

Thank you,
Jeremy Bícha