Intel/format failures markup

[SVN r25777]

status/explicit-failures-markup.xml

@@ -394,6 +394,17 @@
         </mark-unusable>
     </library>
 
+    <!-- format -->
+    <library name="format">
+        <mark-unusable>
+            <toolset name="iw-7_1*"/>
+            <note author="Aleksey Gurtovoy">
+                The failure is caused by a standard library bug: the 
+                iostream components fail to handle <code>ios::internal</code>
+                flag.
+            </note>
+        </mark-unusable>
+    </library>
 
     <!-- graph -->
     <library name="graph">