Bug#1036704: unblock: dhcpcd5/9.4.1-22

[Shengjing Zhu <zhsj@debian.org>]

Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: unblock
X-Debbugs-Cc: dhcpcd5@packages.debian.org, zhsj@debian.org, martin-eric.racine@iki.fi
Control: affects -1 + src:dhcpcd5

Please unblock package dhcpcd5

[ Reason ]
The packages fails to run on ppc64el (syscall is blocked by seccomp
policy).
And `dhcpcd -U` command also fails to run on all arch (newfstatat syscall
introduced by glibc is blocked by seccomp policy)

While trying to run autopkgtests to verify these issues, I find it contains
isolation-machine tests, which never run Debian infra, but are broken.
So this version contains fixes for autopkgtests too.

[ Impact ]
Without the unblock, the package is not functional entirely on ppc64el,
and one subcommand is not functional on all arch.

[ Tests ]
It has autopkgtests, but non-trival ones need isolation-machine.
I've run them on Ubuntu autopkgtest infra.

[ Risks ]
Code is trival and easy to review.

[ Checklist ]
  [x] all changes are documented in the d/changelog
  [x] I reviewed all changes and I approve them
  [x] attach debdiff against the package in testing

[ Other info ]
None

unblock dhcpcd5/9.4.1-22