Add --quiet/-q support to scramble-tree.py, and do a better job of adding new files.
Add --quiet/-q support to scramble-tree.py, and do a better job of
adding new files.

* tools/dev/scramble-tree.py
  (Scrambler.__init__): Accept 'quiet' argument, and lose self.file_name.
  (Scrambler._make_new_file): New helper.
  (Scrambler._mod_append_to_file, Scrambler._mod_remove_from_file,
   Scrambler._mod_delete_file): Speak only when not asked to do otherwise!
  (Scrambler.maybe_add_file): Be quiet when told to, and use the new
    file-maker helper.
  (main): Add support for a --quiet/-q flag.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@851915 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion