go: Rely on go-runtime to provide needed modules

go compiler is including go/src/cmd modules in -dev package which is in
conflict with go-runtime-dev which provides exact same copy of this
module along with other runtime modules, as a result when both go-dev and
go-runtime-dev are included in image then it results in rootfs failures,
here lets make go depend on go-runtime and dont install the cmd module
here explicitly.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>