git: #include <sys/cdefs.h> in a number of headers that use macros from it.

[Sascha Wildner]

commit b2e7ce7de64c19d1a2e902ef57f3745361156b5c
Author: Sascha Wildner <saw at online.de>
Date:   Sun Nov 10 11:12:32 2019 +0100

    #include <sys/cdefs.h> in a number of headers that use macros from it.
    
    All these are public headers and check some kind of __*_VISIBLE macro
    with #if but were not making sure that these macros are available and
    set correctly.

Summary of changes:
 sys/cpu/x86_64/include/signal.h | 2 ++
 sys/net/if_clone.h              | 2 ++
 sys/sys/_fd_set.h               | 2 ++
 sys/sys/_termios.h              | 2 ++
 4 files changed, 8 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b2e7ce7de64c19d1a2e902ef57f3745361156b5c


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