Add a couple of stubs to the release notes for things I noticed while

clearing out my backlog of commit mail.

llvm-svn: 167380

docs/ReleaseNotes.html

@@ -482,9 +482,13 @@ Release Notes</a>.</h1>
     }
     </pre>
 
- </p>
+</p>
+
+<p>SROA - We've re-written SROA to be significantly more powerful.
+<!-- FIXME: Add more text here... --></p>
 
 <ul>
+  <li>Branch weight metadata is preseved through more of the optimizer.</li>
   <li>...</li>
 </ul>