cmd/coordinator: fix build
cmd/coordinator: fix build

Change-Id: Ifcbac5a380ea7b0d88f40e9198125ff5301ff81e
Reviewed-on: https://go-review.googlesource.com/25100
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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