updated for version 7.4.570

Problem:    Building with dynamic library does not work for Ruby 2.2.0
Solution:   Change #ifdefs and #defines. (Ken Takata)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    570,
 /**/
     569,
 /**/