testing/kubernetes: enable on armv7 fix deps and linker options

enable on armv7

build without providers and strip ELF symbols and debug info.

kubelet does not have a hard dependency on cni-plugins. They can be
installed from a pod.

kubelet need GNU du[1] from coreutils and GNU find[2].

[1]: kubernetes/kubernetes#95172
[2]: kubernetes/kubernetes#95186

testing/kubernetes/APKBUILD

@@ -5,18 +5,18 @@
 # Maintainer: Francesco Colista <fcolista@alpinelinux.org>
 pkgname=kubernetes
 pkgver=1.19.4
-pkgrel=0
+pkgrel=1
 pkgdesc="Container Cluster Manager"
 url="https://kubernetes.io/"
-arch="x86_64 aarch64 ppc64le"
+arch="x86_64 aarch64 ppc64le armv7"
 license="Apache-2.0"
 options="!check chmod-clean" # Tests hang
 depends="bash"
 
 _kube_proxy_deps="iptables"
-_kubelet_deps="cni-plugins"
+_kubelet_deps="findutils coreutils"
 _kubeadm_deps="iproute2 socat ethtool conntrack-tools cri-tools"
-makedepends="coreutils findutils go go-bindata linux-headers rsync grep
+makedepends="go go-bindata linux-headers rsync grep
 	$_kube_proxy_deps
 	$_kubelet_deps
 	$_kubeadm_deps
@@ -69,7 +69,7 @@ _services="kube-apiserver kube-controller-manager kube-proxy kube-scheduler"
 
 build() {
 	for _pkgs in $_agent $_cli $_services ; do
-		make GOFLAGS=-v WHAT=cmd/$_pkgs
+		make GOFLAGS="-v -tags=providerless" GOLDFLAGS="-w -s" WHAT=cmd/$_pkgs
 	done
 }