cmd/go: don't pass --buildid=none on FreeBSD
cmd/go: don't pass --buildid=none on FreeBSD

According to the FreeBSD builder, it doesn't work.

TBR=bradfitz
CC=golang-codereviews
https://codereview.appspot.com/121400043

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