[x/blog] blog: add go-cloud article
[x/blog] blog: add go-cloud article

Change-Id: I2338a4f0accf6502718be684e8bfa52f3f670619
Reviewed-on: https://go-review.googlesource.com/125615
Reviewed-by: Cassandra Salisbury <a30d80b2d90928ad58df49afc97d32a54c5a3be1@golang.org>
Reviewed-by: Ross Light <dfccc06f14414bff5a59be7fc90abf4404b47fc8@google.com>
Reviewed-by: Hsin Tsao <40beee88f12ac25e774e03c58e7b40da549d3923@google.com>
X-Blog-Commit: e5e0fdeac2fca3f6b47323426f6db597bc1511c6

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