Support errno in which-error.py.
Support errno in which-error.py.

* tools/dist/which-error.py
  (errno): Import.
  (get_errors): Add errno numbers/names to the dict.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1307589 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion