git: <sys/cdefs.h>: Add __{BEGIN, END}_HIDDEN_DECLS definitions and use them.

[Sascha Wildner]

commit 232e24915be20b5fdc171f2c57b7876462e5b86f
Author: Sascha Wildner <saw at online.de>
Date:   Sun Sep 6 13:06:37 2020 +0200

    <sys/cdefs.h>: Add __{BEGIN,END}_HIDDEN_DECLS definitions and use them.
    
    Remove local empty definitions of these macros in some Makefiles.
    
    Thanks to zrj for testing with a full bulk build.
    
    Taken-from: OpenBSD

Summary of changes:
 lib/librecrypto/Makefile | 2 +-
 lib/libressl/Makefile    | 2 +-
 sys/sys/cdefs.h          | 8 ++++++++
 usr.bin/nc/Makefile      | 2 +-
 4 files changed, 11 insertions(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/232e24915be20b5fdc171f2c57b7876462e5b86f


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