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

[Andrew Cagney]

New commits:
commit 4c2916187cf2a924e4c53322eb3096cb42f1a58c
Author: Andrew Cagney <cagney at gnu.org>
Date:   Thu Jun 28 17:32:42 2018 -0400

    building: fix typo in #error message