Add some more release notes for Clang

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_31@156799 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.html

@@ -96,11 +96,17 @@ <h3>
 
 <p>In the LLVM 3.1 time-frame, the Clang team has made many improvements:</p>
 <ul>
-  <li>C++11 support is greatly expanded including lambdas, initializer lists, constexpr, user-defined literals, and atomics.</li>
-  <li>...</li>
+  <li>Greatly expanded <a href="http://clang.llvm.org/cxx_status.html">C++11
+      support</a> including lambdas, initializer lists, constexpr, user-defined
+      literals, and atomics.</li>
+  <li>A new <a href="http://clang.llvm.org/docs/Tooling.html">tooling</a>
+      library to ease building of clang-based standalone tools.</li>
+  <li>Extended support for
+      <a href="http://clang.llvm.org/docs/ObjectiveCLiterals.html">literals in
+      Objective C</a>.</li>
 </ul>
 
-  <p>For more details about the changes to Clang since the 2.9 release, see the
+  <p>For more details about the changes to Clang since the 3.0 release, see the
 <a href="http://clang.llvm.org/docs/ReleaseNotes.html">Clang release notes</a>
 </p>