[PATCH v2] convert bin/date over to ATF

[Garrett Cooper]

Hi Julio!
    I've made the requested changes and posted a new version of the
diff up to github here: https://github.com/yaneurabeya/freebsd/pull/3
(the patch can be obtained via
https://github.com/yaneurabeya/freebsd/pull/3.patch ).
Thanks!
-Garrett