Automatic merge from submit-queue
Client-gen: show the command used to generate the package in doc.go
#22928 adds a comment in every generated file to show the arguments supplied to client-gen. I received comment (https://github.com/kubernetes/kubernetes/pull/22928#issuecomment-201078363) that it generates too many one-line changes every time the command line argument is changed. To address this problem, this PR only generates that line in doc.go.
@jianhuiz @krousey
22f01f1041