In libsvn_client diff runners: Move output behaviour booleans that just
trigger wrapping behavior up the call chain. The diff drivers shouldn't
define the output behaviour of the driver.

* subversion/libsvn_client/diff.c
  (diff_wc_wc): Remove show_copies_as_adds and use_git_diff_format which only
    change wrapping and ignore ancestry behavior.
  (diff_repos_wc): Remove wrap_create, show_copies_as_adds and
    use_git_diff_format arguments which only change wrapping behavior.

  (do_diff,
   do_diff_summarize): Update callers.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1569917 13f79535-47bb-0310-9956-ffa450edef68