patch 8.1.1109: deleted file still in list of distributed files

Problem:    Deleted file still in list of distributed files.
Solution:   Remove the src/os_w32dll.c entry.
diff --git a/src/version.c b/src/version.c
index 08493fe..00db3b6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1109,
+/**/
     1108,
 /**/
     1107,