Add autoconf checks for extra suppserv definitions that are not present in...

Add autoconf checks for extra suppserv definitions that are not present in releases yet. chan_misdn should now build against the latest release.
(closes issue #11103)
Reported by: IgorG


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@87325 65c4cc65-6c06-0410-ace0-fbb531ad65f3