Skip named_atomics tests if the user does not have the necessary privileges under Windows.
Skip named_atomics tests if the user does not have the necessary
privileges under Windows.

* subversion/tests/libsvn_subr/named_atomic-test.c
  (has_sufficient_privileges): new function
  (test_basics, test_bignums, test_multiple_atomics,
   test_namespaces, test_multithreaded, test_multiprocess): call it

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1326688 13f79535-47bb-0310-9956-ffa450edef68

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