gcc/binutils: Disable NLS/gettext dependencies

gcc/binutils: Disable NLS/gettext dependencies

We force the C locale when running builds for determinstic error messages. We
therefore have no need to NLS support in binutils cross or gcc cross.

We also don't need the standard base/autotools dependencies for our
toolchain components since we don't autoreconf these.

This patch turns off nls and cleans up some of the dependencies resulting
in a slightly less convoluted set of build dependencies.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>