[Toybox] --help annoyance

[enh]

i wanted to check that the Android scheduler policy output wasn't
broken by recent changes, but i can't remember what the -O option is
called...

# ps -A -O
ps: Missing argument to -O (see "ps --help")

fair enough. (though maybe we should have a special case for things
that take an option and just assume that you need to know what the
options are?)

# ps -A -O --help
ps: bad -O '--help'
             ^

okay, fair enough. that one seems unavoidable.

# ps -A --help
ps: Unknown option help (see "ps --help")

that's pretty annoying though...