patch 7.4.2030

Problem:    ARCH must be set properly when using MinGW.
Solution:   Detect the default value of ARCH from the current compiler. (Ken
            Takata)

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2030,
 /**/
     2029,
 /**/