chan_dahdi/sig_analog: Put log message strings on one line.

With the log messages on one line, you can search for the log message seen
in the log and expect to find it.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@432032 65c4cc65-6c06-0410-ace0-fbb531ad65f3