[docs] Move docs/reference/ contents into docs/
diff --git a/configure.ac b/configure.ac
index a73fe62..2a0bc6a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -442,8 +442,7 @@
 test/api/Makefile
 test/shaping/Makefile
 docs/Makefile
-docs/reference/Makefile
-docs/reference/version.xml
+docs/version.xml
 ])
 
 AC_OUTPUT