Simple explanatory note added

[SVN r25667]

status/explicit-failures-markup.xml

@@ -49,7 +49,9 @@
             <toolset name="gcc-2.95.3-linux"/>
             <toolset name="gcc-2.95.3-stlport-4.5.3-linux"/>
             <toolset name="mipspro"/>
-            <note author="P.Droba"/>
+            <note author="P.Droba">
+		The compiler does not support features that are essential for the library.
+            </note>
         </mark-unusable>
     </library>