[docs] Add link to presentation slides.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184518 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/IntroductionToTheClangAST.rst b/docs/IntroductionToTheClangAST.rst
index b62aa58..2051034 100644
--- a/docs/IntroductionToTheClangAST.rst
+++ b/docs/IntroductionToTheClangAST.rst
@@ -11,6 +11,8 @@
 
   <center><iframe width="560" height="315" src="http://www.youtube.com/embed/VqCkCDFLSsc?vq=hd720" frameborder="0" allowfullscreen></iframe></center>
 
+`Slides <http://llvm.org/devmtg/2013-04/klimek-slides.pdf>`_
+
 Introduction
 ============