Resolve a case where we used to create an invalid working copy state. A better
fix would be to fully implement cross wc copies with all layers, as that would
avoid separate code paths for these corner cases.

* subversion/libsvn_wc/wc_db.c
  (db_op_copy_shadowed_layer): Don't recurse below just added not-present
    nodes.

* subversion/tests/cmdline/copy_tests.py
  (copy_subtree_deleted): Remove XFail marker.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1589486 13f79535-47bb-0310-9956-ffa450edef68