Fix test failures after r1440023.

* subversion/tests/libsvn_repos/repos-test.c
  (in_repo_authz, in_repo_groups_authz): Expect SVN_ERR_ILLEGAL_TARGET
    for non-existant paths in the repo.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1440047 13f79535-47bb-0310-9956-ffa450edef68