Send relative path named recordings to the meetme directory instead of sounds

Prior to this patch, no effort was made to parse the path name to determine a proper
destination for recordings of MeetMe's r option. This fixes that.

Review: https://reviewboard.asterisk.org/r/1846/
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Merged revisions 362079 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 362080 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@362081 65c4cc65-6c06-0410-ace0-fbb531ad65f3