updated for version 7.3.978

Problem:    Regexp debug logs don't have a good name.
Solution:   Use clear names and make it possible to write logs for the old and
            new engines separately. (Taro Muraoka)

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    978,
 /**/
     977,
 /**/