Added markup for failing test: it's a confirmed gcc bug.

[SVN r35660]

status/explicit-failures-markup.xml

@@ -1585,6 +1585,13 @@
             <toolset name="gcc-2.95.3-*"/>
             <note refid="3" author="Doug Gregor"/>
         </mark-expected-failures>
+       <mark-expected-failures>
+          <test name="ios_state_unit_test"/>
+          <toolset name="gcc-4.1.0*"/>
+          <note author="John Maddock">
+             This is gcc bug 26526, and is fixed in later releases.
+          </note>
+       </mark-expected-failures>
     </library>
 
     <!-- iostreams -->