patch 8.1.1080: when a screendump test fails, moving the file is a hassle

Problem:    When a screendump test fails, moving the file is a hassle.
Solution:   Instead of appending ".failed" to the file name, keep the same
            file name but put the screendump in the "failed" directory.
            Then the file name only needs to be typed once when moving a
            screendump.
diff --git a/src/version.c b/src/version.c
index d8a65cd..508736a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -776,6 +776,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1080,
+/**/
     1079,
 /**/
     1078,