[release-branch.go1] doc: fix OS X download links

««« CL 6566064 / f58eb9ea0d1d
doc: fix OS X download links

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6566064
»»»

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6566065