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

[Andrew Cagney]

New commits:
commit 2091bf80ebdce38ed41f4c99cb4f5d0b9eeccf97
Author: Andrew Cagney <cagney at gnu.org>
Date:   Wed Aug 16 14:32:49 2017 -0400

    building: simplify adding $(LIBSERPENT) and $(LIBTWOFISH)
    
    Just define them conditionally in userland-cflags.mk;
    this seems to be a good general strategy.
    
    Follow up to a57a60b3bc50be7e843fbc0084500d8de8043bbb