       doc: add release note for 'godoc -analysis'
       doc: add release note for 'godoc -analysis'

	Contains a link to /lib/godoc/analysis/help.html
       which is not yet live.

LGTM=r
R=r, adg
CC=golang-codereviews
https://codereview.appspot.com/88560044

tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go