[Midnightbsd-cvs] src: ucontext.h: sync with freebsd 9 stable.

[laffer1 at midnightbsd.org]

Log Message:
-----------
sync with freebsd 9 stable.

Modified Files:
--------------
    src/sys/sys:
        ucontext.h (r1.4 -> r1.5)
        (http://cvsweb.midnightbsd.org/src/sys/sys/ucontext.h?r1=1.4&r2=1.5)