Regression test-namespace fails on armhf in lxc1 container on arm64 kernel

[Dimitri John Ledkov]

Regression test-namespace fails on armhf in lxc1 container on arm64 kernel

# /usr/lib/systemd/tests/test-namespace
Assertion 'r >= 0' failed at ../src/test/test-namespace.c:84, function test_netns(). Aborting.
Assertion 'r >= 0' failed at ../src/test/test-namespace.c:93, function test_netns(). Aborting.
Assertion 'r >= 0' failed at ../src/test/test-namespace.c:102, function test_netns(). Aborting.
Assertion 'si.si_code == CLD_EXITED' failed at ../src/test/test-namespace.c:108, function test_netns(). Aborting.
Aborted (core dumped)

This appears to be related to https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1708313

to check: lxd (privileged / not priviledged)
to check: lxc privileged
to check: armhf on armhf
to check: priviledged armhf on armhf
to do: git bisect regression