Fix an apparent typo.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@105467 91177308-0d34-0410-b5e6-96231b3b80d8

www/index.html

@@ -128,7 +128,7 @@
 
    <p><a href="libcxx_by_chapter.pdf">Here</a> is a by-chapter breakdown of what
    is passing tests and what isn't. This chart is currently based on testing
-   against g++-4.4.0 with -stdc++0x. </p>
+   against g++-4.4.0 with -std=c++0x. </p>
 
   <!--=====================================================================-->
   <h2>Get it and get involved!</h2>