updated for version 7.3.177

Problem:    MS-Windows: mkdir() doesn't work properly when 'encoding' is
            "utf-8".
Solution:   Convert to utf-16. (Yukihiro Nakadaira)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    177,
 /**/
     176,
 /**/