Prefer setq-local in eshell

Prefer setq-local in eshell

* lisp/eshell/em-cmpl.el (eshell-cmpl-initialize):
* lisp/eshell/em-dirs.el (eshell-dirs-initialize):
* lisp/eshell/em-glob.el (eshell-glob-initialize, eshell-glob-regexp):
* lisp/eshell/em-hist.el (eshell-hist-initialize):
* lisp/eshell/em-prompt.el (eshell-prompt-initialize):
* lisp/eshell/em-rebind.el (eshell-rebind-initialize)
(eshell-setup-input-keymap):
* lisp/eshell/em-script.el (eshell-script-initialize):
* lisp/eshell/em-smart.el (eshell-smart-initialize):
* lisp/eshell/em-term.el (eshell-term-initialize, eshell-exec-visual):
* lisp/eshell/em-tramp.el (eshell-tramp-initialize):
* lisp/eshell/em-unix.el (eshell-unix-initialize, eshell/diff):
* lisp/eshell/esh-arg.el (eshell-arg-initialize):
* lisp/eshell/esh-cmd.el (eshell-cmd-initialize):
* lisp/eshell/esh-io.el (eshell-get-target):
* lisp/eshell/esh-mode.el (eshell-mode):
* lisp/eshell/esh-var.el (eshell-var-initialize): Prefer setq-local.