A hardcoded a branch number was in the prep_tarball which could not work. Changed
it to the  variable.
........

Merged revisions 343789 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@343790 65c4cc65-6c06-0410-ace0-fbb531ad65f3