Use /tmp instead of current dir

[lululombard]

Hi there,

I'm currently writing a system deamon in golang and it's running as /usr/bin/rcsm, the problem is that the auto update tries to create /usr/bin/.rcsm.new /usr/bin/.rcsm.old but /usr/bin is not writable by my deamon, but its own binary is. It would be nice if we could avoid doing modifications in the same directory and use /tmp.

Thanks!