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

 call_to=@@DEFAULT_LD@@

 case "${CTNG_LD_IS}" in

     bfd)    call_to=bfd;;

     gold)   call_to=gold;;

 esac

 exec "${0}.${call_to}" "$@"

 exit $?