Added missing GCC version (4.0) to expected GCC failures of value_init_test

[SVN r41593]

status/explicit-failures-markup.xml

@@ -5437,6 +5437,7 @@ for more information.
             <test name="value_init_test"/>
             <toolset name="gcc-3.3*"/>
             <toolset name="gcc-3.4*"/>
+            <toolset name="gcc-4.0*"/>
             <toolset name="gcc-4.1*"/>
             <toolset name="gcc-4.2*"/>
             <toolset name="gcc-mingw-3.4*"/>