patch 7.4.2168

Problem:    Not running the startup test on MS-Windows.
Solution:   Write vimcmd.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2168,
 /**/
     2167,
 /**/