Use obarray-make instead of make-vector to create obarrays

This prepares for the introduction of an actual obarray type.

* lisp/cedet/semantic/lex-spp.el (semantic-lex-spp-dynamic-map)
(semantic-lex-spp-dynamic-map-stack, semantic-lex-make-spp-table):
* lisp/cedet/semantic/lex.el (semantic-lex-make-keyword-table)
(semantic-lex-make-type-table):
* lisp/completion.el (cmpl-prefix-obarray, cmpl-obarray)
(clear-all-completions):
* lisp/emacs-lisp/checkdoc.el (checkdoc-defun-info):
* lisp/emacs-lisp/eldoc.el (eldoc-message-commands)
(eldoc-edit-message-commands):
* lisp/mail/mail-extr.el (mail-extr-all-top-level-domains):
* lisp/mail/rmailkwd.el (rmail-label-obarray):
* lisp/net/dns.el (dns-cache):
* lisp/net/eww.el (eww-suggested-uris):
* lisp/net/imap.el (imap-open, imap-mailbox-select-1)
(imap-message-copyuid-1, imap-message-appenduid-1):
* lisp/obsolete/pgg.el (pgg-passphrase-cache, pgg-pending-timers):
* lisp/play/cookie1.el (cookie-cache):
* lisp/progmodes/cc-defs.el (c-lang-constants, c-define-lang-constant):
* lisp/progmodes/cc-langs.el (c-keywords-obarray):
* lisp/vc/vc-hooks.el (vc-file-prop-obarray):
* test/lisp/obarray-tests.el (obarrayp-test):
* test/src/minibuf-tests.el (minibuf-tests--strings-to-obarray):
Use obarray-make instead of obarray-make.

lisp/emacs-lisp/checkdoc.el

@@ -1994,7 +1994,7 @@ from the comment."
           (defun-depth (ppss-depth (syntax-ppss)))
 	  (lst nil)
 	  (ret nil)
-	  (oo (make-vector 3 0)))	;substitute obarray for `read'
+	  (oo (obarray-make 3)))	;substitute obarray for `read'
       (forward-char 1)
       (forward-sexp 1)
       (skip-chars-forward " \n\t")