pkg/asset/internal: update vendored skydns manifest
pkg/asset/internal: update vendored skydns manifest

ericchiang/bootkube,kubernetes-incubator/bootkube,hongchaodeng/bootkube,diegs/bootkube,kubernetes-incubator/bootkube,dghubble/bootkube,ericchiang/bootkube,dghubble/bootkube,kubernetes-incubator/bootkube,ericchiang/bootkube,hongchaodeng/bootkube,diegs/bootkube,hongchaodeng/bootkube,dghubble/bootkube,diegs/bootkube