Prefer defvar-local where possible

Prefer defvar-local where possible

* lisp/editorconfig.el (editorconfig-properties-hash):
* lisp/emacs-lisp/comp-run.el (comp-last-scanned-async-output):
* lisp/info-look.el (info-lookup-mode):
* lisp/mh-e/mh-folder.el (mh-generate-sequence-font-lock):
* lisp/net/tramp.el (tramp-temp-buffer-file-name):
* lisp/obsolete/iswitchb.el (iswitchb-eoinput):
* lisp/obsolete/longlines.el (longlines-wrap-beg, longlines-wrap-end)
(longlines-wrap-point, longlines-showing, longlines-decoded):
* lisp/obsolete/tpu-edt.el (tpu-newline-and-indent-p)
(tpu-newline-and-indent-string, tpu-saved-delete-func)
(tpu-buffer-local-map, tpu-mark-flag):
* lisp/progmodes/python.el (python-check-custom-command):
* lisp/textmodes/reftex.el (reftex-docstruct-symbol)
(reftex-isearch-minor-mode): Prefer defvar-local where possible, and
the package does not support Emacs 24.3 or earlier.

(cherry picked from commit e792856b001f260572b4012241748c41e045c638)