Add BASH completion for svnsync.
Add BASH completion for svnsync.

* tools/client-side/bash_completion
  (_svnlook): Provide completion for 'pget', 'pg', 'plist' and 'pl' commands
   of svnlook.
  (_svnsync): New.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@877612 13f79535-47bb-0310-9956-ffa450edef68

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