Add some basic tests for the new svn_task__t API.

* build.conf
  (task-test): Define new binary.
  (__ALL_TESTS__): Register new test binary.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1888589 13f79535-47bb-0310-9956-ffa450edef68
2 files changed