Fix issue 4333, parent moved into child.

* subversion/libsvn_wc/wc_db.c
  (delete_node): Consider nesting in relpath calculation.

* subversion/tests/libsvn_wc/op-depth-test.c
  (test_funcs): Mark move_parent_into_child PASS.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1455108 13f79535-47bb-0310-9956-ffa450edef68