renamed Beman's cygwin (iostreams)

[SVN r30209]

status/explicit-failures-markup.xml

@@ -1052,7 +1052,7 @@
         </mark-expected-failures>
         <mark-expected-failures reason="?">
             <test name="file_descriptor_test"/>
-            <toolset name="gcc-3_3_3-cygwin"/>
+            <toolset name="gcc-3_4_4-cygwin"/>
             <note author="Jonathan Turkanis" refid="29"/>
         </mark-expected-failures>
         <mark-expected-failures>