[x/blog] blog: add new article about go generate
[x/blog] blog: add new article about go generate

Change-Id: Id9a9885ceb0bde6db65d3cdb2cb6964dab4ef8ab
Reviewed-on: https://go-review.googlesource.com/1931
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>
X-Blog-Commit: 5216eb88db404941ccc701ca323591b5af3178b4

golang/website,golang/website,golang/website,golang/website,golang/website,golang/website,golang/website