Correct lossage from DFA scheduler merge

[Vladimir N. Makarov]

Zack Weinberg wrote:

> A bunch of gunk was removed from the Makefile when we got build-side
> libiberty.  The merge of the DFA scheduler put much of it back.  This
> patch takes it out again.
>
> Also, there was no rule for $(HOST_PREFIX_1)varray.o, which would have
> caused a build failure in a build!=host environment.
>

Thanks, Zack.  The dfa patch was big.  So I've missed it.

>
> Vlad, please go through the diffs for the merge and verify that
> nothing else got accidentally reverted.
>

Ok, I'll check this.  Also I'll try to build a canadian cross.

>
> Bootstrapping i686-linux; will apply as obvious if successful
> (mainline only)
>

Vlad