Log Message:
(devel/cflow-mode) Updated 1.6 to 1.7

Picked from ChangeLog:

2021-12-23  Sergey Poznyakoff  <gray@gnu.org>
	Fix the info direntry for cflow mode

2021-04-04  Sergey Poznyakoff  <gray@gnu.org>
	* elisp/cflow-mode.el: Fix regular expressions. Character class \w
	cflow-mode: functions for moving to the next and previous calls
	* elisp/cflow-mode.el (cflow-next-function)

2021-04-01  Sergey Poznyakoff  <gray@gnu.org>
	cflow-mode: new command cflow-find-caller