debugging: Add reference to heisenbug discussion section

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/debugging/debugging.tex b/debugging/debugging.tex
index 7715cf8..e621ebd 100644
--- a/debugging/debugging.tex
+++ b/debugging/debugging.tex
@@ -1401,7 +1401,8 @@
 Although producing an anti-heisenbug for a given heisenbug is more an
 art than a science, the following sections give some tips on
 generating the corresponding species of anti-heisenbug.
-These are followed by a discussion section.
+These are followed by a discussion section,
+Section~\ref{sec:debugging:Heisenbug Discussion}.
 
 \subsubsection{Add Delay}
 \label{sec:debugging:Add Delay}