add some links to the tutorial index and between chapters.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43730 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/tutorial/LangImpl8.html b/docs/tutorial/LangImpl8.html
index 4e7f087..66155a0 100644
--- a/docs/tutorial/LangImpl8.html
+++ b/docs/tutorial/LangImpl8.html
@@ -15,6 +15,7 @@
  tidbits</div>
 
 <ul>
+<li><a href="index.html">Up to Tutorial Index</a></li>
 <li>Chapter 8
   <ol>
     <li><a href="#conclusion">Tutorial Conclusion</a></li>