Fix jitter buffer log file creation

This adjusts '/'-to-'#' replacement to replace all instances of '/'
instead of just the first to ensure that the jitter buffer log file
gets the correct name as per Richard Kenner's suggestion.

(closes issue ASTERISK-21036)
Reported by: Richard Kenner
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Merged revisions 399402 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 399403 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 399404 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@399405 65c4cc65-6c06-0410-ace0-fbb531ad65f3