binutils: add upstream patch to fix --enable-install-libiberty flag

Fixes http://autobuild.buildroot.org/results/1ea/1ea98985ce06dc1b7569ef5abe2fc13090fb5f3a



The upstream patch patches both configure.ac and configure, so we keep
that.

It is numbered 001 because it is an upstream patch, so it should come
before the buildroot patches.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>