internal/gophers: update Dmitri Shuralyov's emails
internal/gophers: update Dmitri Shuralyov's emails

Add my @golang.org email.

Change-Id: Icb0fd9447e20e454a885a5fb19ad61733ae68f46
Reviewed-on: https://go-review.googlesource.com/129996
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/build,golang/build,golang/build,golang/build