[boost] [type traits] is_abstract expected failures

From: Doug Gregor (dgregor_at_[hidden])
Date: 2005-05-24 09:24:49

The following compilers are failing is_abstract_test:
   - cw-9_5-darwin
   - gcc-3_3-darwin
   - cw-9_4

  From the list of compilers that are already expected to fail this test 
(include CW 9.3 and GCC 3.3.x), I think they should be marked as known 
failures and will do so unless anyone objects.

        Doug