xpressive does not support gcc-2.95

[SVN r31310]

status/explicit-failures-markup.xml

@@ -3265,6 +3265,7 @@ for more information.
     <library name="xpressive">
 
         <mark-unusable>
+            <toolset name="gcc-2.95.3*"/>
             <toolset name="msvc*"/>
             <toolset name="vc-6_5*"/>
             <toolset name="vc-7_0"/>