Update failure markup for unordered on pathscale.

[SVN r68404]

status/explicit-failures-markup.xml

@@ -5861,9 +5861,10 @@ These tests will fail in most compilers that don't support rvalue references.
         <test name="compile_map"/>
         <test name="compile_set"/>
         <toolset name="gcc-open64"/>
-        <toolset name="pathscale-*"/>
+        <toolset name="pathscale-3.*"/>
         <note author="Daniel James">
-            Concept checks don't seem to work on pathscale.
+            Failing on compilers that don't have good support
+            concept check support.
         </note>
       </mark-expected-failures>
     </library>