main/message: Add a new-line to a DEBUG message

........

Merged revisions 421859 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 421860 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@421861 65c4cc65-6c06-0410-ace0-fbb531ad65f3