r150960 changed ltmain.sh and broke the build

[Paolo Bonzini]

>>    Paolo, is this OK if I test it just by restrapping all the target libs in an
>> existing $objdir and checking it then all installs correctly?
>
>    NM.  Something went wrong during that build because I had the wrong tools in
> my PATH.  I'm just doing a clean non-bootstrap build - since this only affects
> target libs that should be ok, yeah?

Yes.  @ is fine.

Paolo