vc7 reenabled

[SVN r28909]

status/explicit-failures-markup.xml

@@ -61,7 +61,6 @@
             <toolset name="gcc-2.95.3-stlport-4.5.3-linux"/>
             <toolset name="mipspro"/>
             <toolset name="sunpro-5_3-sunos"/>
-            <toolset name="vc7"/>
             <note author="P.Droba">
 		        The compiler does not support features that are essential for the library.
             </note>