patch 7.4.2221

Problem:    printf() does not support binary format.
Solution:   Add %b and %B. (Ozaki Kiichi)

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2221,
 /**/
     2220,
 /**/