Backport commit 1c7db8aa3 from Emacs

* lisp/org-ctags.el:
* lisp/org-macs.el: Explicitly require cl-lib as needed.

Explicitly require cl-lib where needed
1c7db8aa30969d0bc0e6d35b9bd57c70314ed9d0
Glenn Morris
Fri Mar 16 20:41:17 2018 -0400

lisp/org-ctags.el

@@ -137,6 +137,7 @@
 
 ;;; Code:
 
+(eval-when-compile (require 'cl-lib))
 (require 'org)
 
 (defgroup org-ctags nil

lisp/org-macs.el

@@ -31,6 +31,7 @@
 
 ;;; Code:
 
+(require 'cl-lib)
 (require 'format-spec)
 
 (declare-function org-string-collate-lessp "org-compat" (s1 s2 &optional locale ignore-case))