Sound confirmation of call pickup success.

(closes issue #13826)
 Reported by: azielke
 Patches: 
       pickupsound2-trunk.patch uploaded by azielke (license 548)
       __20081124_bug_13826_updated.patch uploaded by lmadsen (license 10)
 Tested by: lmadsen


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@178919 65c4cc65-6c06-0410-ace0-fbb531ad65f3