Add a note about the JIT changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18133 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.html

@@ -111,6 +111,8 @@ benchmarks, and <b>many</b> other C and C++ programs.</p>
   <li>llvmgcc and llvmg++ now emit source line number information when '-g' is
       passed in.  This information can be used with llvm-db or other tools and
       passes.</li>
+  <li>The target-to-JIT interfaces <a href="http://llvm.cs.uiuc.edu/PR283">are 
+      now much simpler</a> and more powerful.</li>
 </ol>
 
 </div>