Add lto doc link.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29660 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/index.html b/docs/index.html
index 81cb72f..367296b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -215,6 +215,10 @@
 the LLVM System Library (<tt>lib/System</tt>) and how to keep LLVM source code
 portable</li>
 
+<li><a href="LinkTimeOptimization.html">Link Time Optimization</a> - This
+document describes the interface between LLVM intermodular optimizer and
+the linker and its design</li>
+
 </ul>