Convert several DEBUG logs into ast_debug.

(closes issue #12444)
Reported by: IgorG
Patches:
      channel_c_debug.diff uploaded by IgorG (license 20)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@114131 65c4cc65-6c06-0410-ace0-fbb531ad65f3