libtool update for powerpc64le-linux

[Alan Modra]

On Wed, Sep 18, 2013 at 10:14:16AM -0400, David Edelsohn wrote:
> Please ensure that you use the correct version of autoconf to
> regenerate the files. I don't think that the same version of autoconf
> is used in all directories.

gcc is OK in this respect.  autoconf-2.64 is used throughout.  It's
src that is a hodge-podge of different versions.

-- 
Alan Modra
Australia Development Lab, IBM