[PATCH] Add support for ld-elf.so.hints on FreeBSD

[Diego 'Flameeyes' Pettenò]

While working on Gentoo/FreeBSD I had quite a few problems with linking, as 
binutils shipped with FreeBSD base system are patched to get the search paths 
(when using a native ld) from the ld-elf.so hints file.

The two attached patches are forward ports of the original patch (a bit 
reworked as there were changes in the API it seems, before it was passing the 
library name, now a dt_needed struct pointer), applying to version 2.16.1 and 
2.16.91.0.6 (it's a refresh of the other, after fixing the change between 
*-linux-gnu* and the new check for uclibc/glibc targets).

This is not the only change between "vanilla" binutils and freebsd's ones, but 
it's for sure the most important to use them as system binutils. The other 
changes are bfd updates, but I haven't forward ported them yet.

This is the first time that I spend time on binutils sources so I'm not sure 
if I'm doing it right (both wrt sources patch and sending it here).
Sorry if I'm doing something wrong.

-- 
Diego "Flameeyes" Pettenò - http://dev.gentoo.org/~flameeyes/
Gentoo/ALT lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE
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