[Toybox] reboot

[enh]

so, Android has a "reboot", but it's implementation is fundamentally
different from the toys/other/reboot.c, and the options that
toys/other/reboot.c has don't make sense, and it has the -p option
(which toys/other/reboot.c should probably have too).

is there a reasonable way to handle this --- same command name but
different arguments and implementation?

-- 
Elliott Hughes - http://who/enh - http://jessies.org/~enh/
Android native code/tools questions? Mail me/drop by/add me as a reviewer.