misc/nacl/testzip.proto: include cmd/internal/* to fix build
misc/nacl/testzip.proto: include cmd/internal/* to fix build

LGTM=adg, dave
R=golang-codereviews, adg, dave
CC=golang-codereviews
https://codereview.appspot.com/123050043

wesolows/golang,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang,wesolows/golang-old,wesolows/golang-old,wesolows/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old