patch 9.0.1619: the focus gained/lost escape sequences cause trouble

Problem:    The focus gained/lost escape sequences cause trouble for a
            terminal where Vim does not expect them.
Solution:   Always recognize the codes for focus gained/lost. (closes #12499)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1619,
 /**/
     1618,
 /**/