doc/godoc.js: assign tmp. id to nodes without id in generateTOC()
doc/godoc.js: assign tmp. id to nodes without id in generateTOC()

R=adg
CC=golang-dev
http://codereview.appspot.com/6604062

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go