libc/newlib: fix typo in "bump version to 2.1.0"

Fix a typo in the commit http://crosstool-ng.org/hg/crosstool-ng/rev/b966620c7b1e

Signed-off-by: "Daniel Zimmermann" netzimme@gmail.com
Message-Id: <f2dbd80da6affb11089a.1388669655@haus-VirtualBox>
Patchwork-Id: 306129

#!/bin/sh

set -e

printf "Running autoconf...\n"

autoconf -Wall --force

printf "Done. You may now run:\n    ./configure\n"