[Swan-commit] Changes to ref refs/heads/main

[Andrew Cagney]

New commits:
commit 652860fed5b99537709de1ad0f92d9219debf623
Author: Andrew Cagney <cagney at gnu.org>
Date:   Tue Jul 19 10:47:14 2022 -0400

    building: add darwin.mk stub for #751