Make "kubernetes" a server binary.

It includes many of the server components which we only expect to be
able to build in the server target architectures, but it is included in
the client build targets.

hack/lib/golang.sh

@@ -25,6 +25,7 @@ readonly KUBE_SERVER_TARGETS=(
   cmd/kube-controller-manager
   cmd/kubelet
   cmd/hyperkube
+  cmd/kubernetes
   plugin/cmd/kube-scheduler
 )
 readonly KUBE_SERVER_BINARIES=("${KUBE_SERVER_TARGETS[@]##*/}")
@@ -37,7 +38,6 @@ readonly KUBE_SERVER_PLATFORMS=(
 # The set of client targets that we are building for all platforms
 readonly KUBE_CLIENT_TARGETS=(
   cmd/kubectl
-  cmd/kubernetes
 )
 readonly KUBE_CLIENT_BINARIES=("${KUBE_CLIENT_TARGETS[@]##*/}")
 readonly KUBE_CLIENT_BINARIES_WIN=("${KUBE_CLIENT_BINARIES[@]/%/.exe}")