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

[Andrew Cagney]

New commits:
commit 30fb310c02413b0fdbbbbed67b9e397bbeef1d3f
Author: Andrew Cagney <cagney at gnu.org>
Date:   Mon Jun 18 20:48:36 2018 -0400

    building: let USERLAND_CFLAGS be set from port specific .mk files