Increase the size of the variable space for writing/reading persistent queue...

 Increase the size of the variable space for writing/reading persistent queue member data to allow for larger queues of members. (Matthew Roth #7703)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@39516 65c4cc65-6c06-0410-ace0-fbb531ad65f3