patch 8.1.1124: insert completion flags are mixed up

Problem:    Insert completion flags are mixed up.
Solution:   Clean up flags use of ins_compl_add() and cp_flags.

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1124,
 /**/
     1123,
 /**/