Use correct grammatical number localisation for conflict summary messages.

* subversion/svn/notify.c
  (resolved_str, remaining_str): New.
  (svn_cl__notifier_print_conflict_stats):
   Call resolved_str and remaining_str for number-aware
   localisation of messages.

Approved by: cmpilato


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1468565 13f79535-47bb-0310-9956-ffa450edef68