updated for version 7.2.388

Problem:    Ruby with MingW still doesn't build all versions.
Solution:   Different approach to build file. (Sergey Khorev)

src/version.c

@@ -681,6 +681,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    388,
 /**/
     387,
 /**/