Boost.Ratio/Chrono: Mark Borland and Pathscale compilers as unusable

            The compiler does not support features that are essential for the library.


[SVN r67720]

status/explicit-failures-markup.xml

@@ -478,6 +478,17 @@
         </test>
     </library>
 
+    <!-- chrono -->
+    <library name="chrono">
+      <mark-unusable>
+        <toolset name="borland-*"/>
+        <toolset name="pathscale*"/>
+        <note author="Vicente J. Botet Escriba">
+            The compiler does not support features that are essential for the library.
+        </note>
+      </mark-unusable>
+    </library>
+
     <!-- circular_buffer -->
     <library name="circular_buffer">
         <mark-expected-failures>
@@ -4448,6 +4459,10 @@ for more information.
     <library name="ratio">
       <mark-unusable>
         <toolset name="borland-*"/>
+        <toolset name="pathscale*"/>
+        <note author="Vicente J. Botet Escriba">
+            The compiler does not support features that are essential for the library.
+        </note>
       </mark-unusable>
         <mark-expected-failures>
             <test name="mpl_plus_pass"/>