(kill-new): Compute 2nd arg to interprogram-cut-function based on REPLACE.

lisp/simple.el

@@ -1131,7 +1131,7 @@ the front of the kill ring, rather than being added to the list."
 	(setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
   (setq kill-ring-yank-pointer kill-ring)
   (if interprogram-cut-function
-      (funcall interprogram-cut-function string t)))
+      (funcall interprogram-cut-function string (not replace))))
 
 (defun kill-append (string before-p)
   "Append STRING to the end of the latest kill in the kill ring.