lispref/ChangeLog: Add bug ID to the previous change.
authorK. Handa <handa@gnu.org>
Mon, 17 Jun 2013 15:08:07 +0000 (00:08 +0900)
committerK. Handa <handa@gnu.org>
Mon, 17 Jun 2013 15:08:07 +0000 (00:08 +0900)

Trivial merge