patch 7.4.1417

Problem:    Missing appveyor.bat from the distribution.
Solution:   Add it to the list of files.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1417,
 /**/
     1416,
 /**/