[master] 0209ce360 build: Distribute doc/sphinx/vcl-design-patterns/

[Dridi Boukelmoune]

commit 0209ce360820503f0fa0e73764347eb862d9b2c1
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Sep 7 15:26:59 2021 +0200

    build: Distribute doc/sphinx/vcl-design-patterns/

diff --git a/doc/sphinx/Makefile.am b/doc/sphinx/Makefile.am
index 8327b478f..cb4e42881 100644
--- a/doc/sphinx/Makefile.am
+++ b/doc/sphinx/Makefile.am
@@ -61,6 +61,7 @@ EXTRA_DIST = \
 	tutorial \
 	reference \
 	users-guide \
+	vcl-design-patterns \
 	vtc-syntax.py \
 	whats-new