rioexecclient: fix arg ordering.
rioexecclient: fix arg ordering.

Paths starting with dashes shouldn't be a problem.

This is asthetically rather irritating, because we had this sort of dream that rio processes in `ps` would tend to have their most relevant parameters listed first.  No longer so.

Signed-off-by: Eric Myhre <2346ad27d7568ba9896f1b7da6b5991251debdf2@exultant.us>

polydawn/rio,polydawn/rio