Add line # info

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18403 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.html

@@ -146,6 +146,9 @@ benchmarks, and <b>many</b> other C and C++ programs.</p>
       an abstract target description, instead of requiring them to be hand 
       written.</li>
   <li>LLVM regression and feature tests can now be run with DejaGNU.</li>
+  <li>llvmgcc and llvmg++ now emit source-level line number information, making
+      it possible to map from LLVM code back to source.  This is currently used
+      by llvm-db.</li>
 </ol>
 
 </div>