patch 8.1.1120: cannot easily get directory entry matches

Problem:    Cannot easily get directory entry matches.
Solution:   Add the readdir() function. (Yasuhiro Matsumoto, closes #2439)
diff --git a/src/version.c b/src/version.c
index 40d802a..b3d7abc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1120,
+/**/
     1119,
 /**/
     1118,