spec: Fix run-time panic header id
spec: Fix run-time panic header id

Everything was linking to "Run_time_panics", but the id was "Run_time_errors".

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/961042

Committer: Rob Pike <4dc7c9ec434ed06502767136789763ec11d2c4b7@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go