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

[Andrew Cagney]

New commits:
commit a6af52592e8b408e3062b239999ef3c641e71f8e
Author: Andrew Cagney <cagney at gnu.org>
Date:   Tue Jul 17 15:58:37 2018 -0400

    building: move $(builddir): rule to  builddir.mk
    
    So it is easier to add to makefiles.