patch 8.1.1679: test using SwapExists autocommand file may fail

Problem:    Test using SwapExists autocommand file may fail.
Solution:   Remove the SwapExists autocommand.
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index b3eecd7..4585cd3 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -42,6 +42,8 @@
   function s:swap_exists()
     let v:swapchoice = s:swap_choice
   endfunc
+  " Remove the catch-all that runtest.vim adds
+  au! SwapExists
   augroup test_window_cmd_wincmd_gf
     autocmd!
     exec "autocmd SwapExists " . fname . " call s:swap_exists()"
diff --git a/src/version.c b/src/version.c
index e48dd60..3263f69 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1679,
+/**/
     1678,
 /**/
     1677,