package/binutils: make binutils 2.46.1 be the default

Now that support for binutils 2.47 has been introduced, we follow our
policy of making binutils 2.46.1 the default version.

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>