patch 9.0.0397: :defer not tested with exceptions and ":qa!"

Problem:    :defer not tested with exceptions and ":qa!".
Solution:   Test :defer works when exceptions are thrown and when ":qa!" is
            used.  Invoke the deferred calls on exit.

src/version.c

@@ -703,6 +703,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    397,
 /**/
     396,
 /**/