update unexplained date-time failures for stlport4 msvc 7.1

[SVN r36997]

status/explicit-failures-markup.xml

@@ -956,6 +956,17 @@
             </note>
         </mark-expected-failures>
 
+        <mark-expected-failures>
+            <test name="testdate_input"/>
+            <test name="testdate_input_dll"/>
+            <toolset name="msvc-7.1_stlport4"/>
+            <note author="J. Garland">
+               The STLPort standard library has issues with some custom
+               facet settings causing an unexplained failure in these
+               facet tests.
+            </note>
+        </mark-expected-failures>
+
         <mark-expected-failures>
             <test name="testdate_facet_new"/>
             <test name="testdate_facet_new_dll"/>