Added note about the failure of smart_ptr / weak_ptr_test on Tru64/CXX-7.1.

[SVN r30841]

status/explicit-failures-markup.xml

@@ -1859,6 +1859,11 @@ for more information.
             <toolset name="sunpro-5_3-sunos"/>
             <note refid="32" author="Peter Dimov"/>
         </mark-expected-failures>
+        <mark-expected-failures>
+            <test name="weak_ptr_test"/>
+            <toolset name="tru64cxx71-006"/>
+            <note author="Markus Schoepflin" refid="3"/>
+        </mark-expected-failures>
     </library>