Ruby

• ext/-test-/win32/dln/libdlntest.c (dlntest_ordinal): no need to
  specify export in the source file because .def file do it.
  get rid of warning on linking.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45323 b2dd03c8-39d4-4d8f-98ff-823fe69b080e