git: stdc - add __returns_twice

[Matthew Dillon]

commit c18f110e6829703fcd6a2f676c006b22d17119c6
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Sat Jun 6 19:54:42 2015 -0700

    stdc - add __returns_twice
    
    * Add __returns_twice attribute support.
    
    * Use for longjmp() and vfork() plus any variants.
    
    Taken-From: FreeBSD

Summary of changes:
 include/setjmp.h | 6 +++---
 include/unistd.h | 2 +-
 sys/sys/cdefs.h  | 7 +++++++
 3 files changed, 11 insertions(+), 4 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c18f110e6829703fcd6a2f676c006b22d17119c6


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