updated for version 7.3.174

Problem:    When Exuberant ctags binary is exctags it's not found.
Solution:   Add configure check for exctags. (Hong Xu)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    174,
 /**/
     173,
 /**/