misc/emacs: godef: print the entire description, not just the first line

When identifying structs or interfaces we really want to know
their makeup, not just their name.

R=adonovan
CC=golang-dev
https://codereview.appspot.com/13042043

Committer: Alan Donovan <adonovan@google.com>
runtime: fix goroutine stack accounting
Fixes issue 6166.
Fixes issue 6168.

R=golang-dev, bradfitz, remyoudompheng
CC=golang-dev
https://codereview.appspot.com/12927045
test: say that nilptr2.go requires 256+MB stack
Fixes issue 6161.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/13059043