Kubernetes 1.21.3 fails to build on armv6 and armv7.
See:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:ARM/kubernetes1.21/standard/armv7l

It segfaults while generating the docs:

[  897s]     cmd/genyaml
[ 1361s] make: Leaving directory
'/home/abuild/rpmbuild/BUILD/kubernetes-1.21.3'
[ 1362s] /home/abuild/rpmbuild/BUILD/kubernetes-1.21.3/hack/lib/util.sh: line
241: 10730 Segmentation fault      "${gendocs}"
"${dest}/docs/user-guide/kubectl/"
[ 1362s] !!! [0720 14:23:16] Call tree:
[ 1362s] !!! [0720 14:23:16]  1: ./hack/update-generated-docs.sh:40
kube::util::gen-docs(...)
[ 1362s] + true
[ 1362s] + pushd docs
[ 1362s] ~/rpmbuild/BUILD/kubernetes-1.21.3/docs
~/rpmbuild/BUILD/kubernetes-1.21.3
[ 1362s] + pushd admin
[ 1362s] /var/tmp/rpm-tmp.7hlO1V: line 52: pushd: admin: No such file or
directory
[ 1362s] error: Bad exit status from /var/tmp/rpm-tmp.7hlO1V (%build)