patch 8.2.4090: after restoring a session buffer order can be quite different

Problem:    After restoring a session buffer order can be quite different.
Solution:   Create buffers first. (Evgeni Chasnovski, closes #9520)
diff --git a/src/version.c b/src/version.c
index 2bee440..b65dac3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4090,
+/**/
     4089,
 /**/
     4088,