Update bash completion support.
Update bash completion support.

* tools/client-side/bash_completion
  (_svn): Add the new "--change"/"-c" option to "diff" and "merge".

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion