In bump-to-19.py, delete the old subdirectory '.svn' dirs.  Also shorten the progress messages.
In bump-to-19.py, delete the old subdirectory '.svn' dirs.  Also shorten the
progress messages.

* tools/dev/wc-ng/bump-to-19.py
  (dotsvn_path, tmp_path): New functions.
  (migrate_wc_subdirs): Keep track of which dirs we've migrated, and delete
    their .svn's afterwards. Only print one line of progress info per dir.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@991231 13f79535-47bb-0310-9956-ffa450edef68

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