Don't set isearch-success in isearch-wrap functions

* lisp/comint.el (comint-history-isearch-wrap):
* lisp/simple.el (minibuffer-history-isearch-wrap):
Don't set isearch-success to t, so isearch-repeat won't skip the
beginning of the wrapped match with (forward-char (if isearch-forward 1 -1)).
3 jobs for master in 14 minutes and 56 seconds (queued for 12 seconds)
Status Job ID Name Coverage
  Fast
passed #16537
test-fast-inotify

00:07:45

 
  Normal
passed #16538
test-lisp-inotify

00:02:30

passed #16539
test-lisp-net-inotify

00:07:09