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

reporter_name="Yann E. MORIN"

reporter_url="http://ymorin.is-a-geek.org/"

reporter_comment="Toolchain for the Raspberry Pi, with hard-float."