fix conflict between --stats and --progress
fix conflict between --stats and --progress

the --stats output would be slightly garbled by --progress, because of
the \r that is output at the last line...

example:

    initializing cache
    reading files cache
    processing files
    ------------------------------------------------------------------------------ s/twotone
    Archive name: 2015-10-15-test

RonnyPfannschmidt/borg,edgewood/borg,edgimar/borg,edgewood/borg,mhubig/borg,edgewood/borg,RonnyPfannschmidt/borg,raxenak/borg,edgimar/borg,RonnyPfannschmidt/borg,raxenak/borg,edgimar/borg,edgewood/borg,edgimar/borg,RonnyPfannschmidt/borg,mhubig/borg,RonnyPfannschmidt/borg,raxenak/borg,mhubig/borg,raxenak/borg