added link to "literal export" from Babel in orgguide

doc/orgguide.texi

@@ -2604,6 +2604,8 @@ Org-mode buffer.
 
 @seealso{
 @uref{http://orgmode.org/manual/Working-with-source-code.html#Working-with-source-code,Chapter 14 of the manual}@*
+@uref{http://orgmode.org/manual/Literal-examples.html#Literal-examples,
+Chapter 11.3 of the manual}@*
 @uref{http://orgmode.org/worg/org-contrib/babel/index.php,
 The Babel site on Worg}}