Some of the symmetric merge tests fail in a release build so mark them WIMP.
Some of the symmetric merge tests fail in a release build so mark them WIMP.

* subversion/tests/cmdline/merge_symmetric_tests.py
  (merge_to_and_fro_1_1, merge_to_and_fro_1_2,
   merge_to_and_fro_2_1, merge_to_and_fro_2_2,
   merge_to_and_fro_3_1, merge_to_and_fro_3_2,
   merge_to_and_fro_4_1, merge_to_and_fro_4_2): Mark WIMP.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1345270 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion