Add yet another move regression test for another problem that should be solved.

* subversion/tests/libsvn_wc/op-depth-test.c
  (movedhere_extract_retract): New test, a registered move of 'nothing'
  (test_funcs): Add movedhere_extract_retract.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1538812 13f79535-47bb-0310-9956-ffa450edef68