[release-branch.go1.1] doc: add go1.1.1 to the release notes

««« CL 10236045 / 3cda43260443
doc: add go1.1.1 to the release notes

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/10236045
»»»

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/10245044
1 file changed