patch 8.0.0608: cannot manipulate other than the current quickfix list

Problem:    Cannot manipulate other than the current quickfix list.
Solution:   Pass the list index to quickfix functions. (Yegappan Lakshmanan)
diff --git a/src/version.c b/src/version.c
index e96a388..70d6201 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    608,
+/**/
     607,
 /**/
     606,