Add test for issue #2971.
Add test for issue #2971.

* subversion/tests/cmdline/merge_tests.py
  (reverse_merge_prop_add_on_child): New test for issue #2971.
  (test_list): Add reverse_merge_prop_add_on_child, set to always XFail as
  the test segfaults.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@867293 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion