cmd/godoc: add x/website redirect
cmd/godoc: add x/website redirect

Add a redirect for the recently created x/website subrepository.

It's not yet included at https://golang.org/pkg/#subrepo because it's
in development. Once development reaches the point that x/website
is the canonical location of the golang.org server, we can consider
including x/website at https://golang.org/pkg/#subrepo (just like
x/blog, x/tour, x/build are already included there).

Updates golang/go#29206

Change-Id: I6889c1f5e40f11abca944b217a7354f76c08c8eb
Reviewed-on: https://go-review.googlesource.com/c/156337
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Run-TryBot: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools