Expand markup for regex_regress_threaded to all gcc versions on Tru64.

[SVN r35331]

status/explicit-failures-markup.xml

@@ -3447,7 +3447,7 @@ for more information.
         </mark-expected-failures>
        <mark-expected-failures>
           <test name="regex_regress_threaded"/>
-          <toolset name="gcc-4_0_3_tru64"/>
+          <toolset name="gcc-*_tru64"/>
           <note author="J. Maddock">
              GCC on tru64 appears not to cope with C++ exceptions
              thrown from within threads.