patch 8.1.1677: tests get stuck when running into an existing swapfile

Problem:    Tests get stuck when running into an existing swapfile.
Solution:   Set v:swapchoice to "q" and report an error. (Daniel Hahler,
            closes #4644)
diff --git a/src/version.c b/src/version.c
index c4fee1c..ae0df81 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1677,
+/**/
     1676,
 /**/
     1675,