patch 9.0.1005: a failed test may leave a swap file behind

Problem:    A failed test may leave a swap file behind.
Solution:   Delete the swap file to avoid another test to fail.  Use another
            file name.
diff --git a/src/version.c b/src/version.c
index 1f21dbc..33a7bf8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1005,
+/**/
     1004,
 /**/
     1003,