fix typo in the marking of function_types library tests

[SVN r41276]

status/explicit-failures-markup.xml

@@ -1488,10 +1488,10 @@
     <!-- function_types -->
     <library name="function_types">
         <mark-expected-failures>
-            <test name="nonmember_ccs.cpp"/>
-            <test name="nonmember_ccs_exact.cpp"/>
-            <test name="member_ccs.cpp"/>
-            <test name="member_ccs_exact.cpp"/>
+            <test name="nonmember_ccs"/>
+            <test name="nonmember_ccs_exact"/>
+            <test name="member_ccs"/>
+            <test name="member_ccs_exact"/>
             <toolset name="acc*"/>
             <note author="Boris Gubenko" refid="44"/>
         </mark-expected-failures>