better note for iostreams library test compose_test on gcc-3.4.6_linux_ia64

[SVN r42722]

status/explicit-failures-markup.xml

@@ -1960,9 +1960,9 @@
             <test name="compose_test"/>
             <toolset name="gcc-3.4.6_linux_ia64"/>
             <note author="Boris Gubenko">
-                On this machine, linking of this test takes longer than
-                10 minutes which is a time limit set for bjam. When linked
-                manually, the test succeeds.
+                On this platform, linking this test takes longer than 10 minutes
+                which is a time limit specified for bjam. When linked manually,
+                the test succeeds.
             </note>
         </mark-expected-failures>
         <mark-expected-failures reason="?">