other/42980: fix make -j install

[Ralf Wildenhues]

* DJ Delorie wrote on Mon, Mar 01, 2010 at 09:47:45PM CET:
> 
> > +dependencies = { module=install-target-libiberty; on=install-libiberty; };
> 
> Won't this cause host-libiberty to be installed when you type "make
> install-target-libiberty" ?

Well, yes.  But if I understand the code correctly, then even before
this patch, "make install" would cause host-libiberty to be installed.
IOW, this patch at least ensures that 'make install' installs the right
libiberty last, same with "make install-target-libiberty".  Am I missing
something?

Thanks,
Ralf