Mark toolsets unusable with program_options.

[SVN r22960]

status/explicit-failures-markup.xml

@@ -388,6 +388,23 @@
                 </note>
             </mark-failure>
         </test>
+    </library> 
+
+    <!-- program_options -->
+
+    <library name="program_options">
+      <mark-unusable>
+        <toolset name="msvc"/>
+        <toolset name="msvc-stlport"/>
+        <toolset name="borland"/>
+        <toolset name="borland-5.6.4"/>
+        <toolset name="borland-5.5.1"/>
+        <toolset name="vc7"/>
+
+        <note>
+          The compilers have bugs which prevent the library from working.
+        </note>
+      </mark-unusable>
     </library>
 
     <!-- python -->