Added limits_test markup

[SVN r34224]

status/explicit-failures-markup.xml

@@ -400,6 +400,14 @@
                 <note author="B. Dawes" refid="3"/>
             </mark-failure>
         </test>
+        <test name="limits_test">
+            <mark-failure>
+                <toolset name="gcc-3_4_4_tru64"/>
+                <note author="John Maddock">
+                   Long double NaN's are apparently handled incorrectly on this platform.
+                </note>
+            </mark-failure>
+        </test>
 
         <test name="limits_test">
             <mark-failure>