bindings: rust: add version number to dependencies

bindings: rust: add version number to dependencies

When publishing to crates.io, all dependencies need to have a version
number. When building from crates.io the version number will be used,
otherwise the `path` is effective for builds when checking out the
repository.

As discussed on the maillinglist [1], each crate will have their own
version number (like the other language bindings) that will be bumped as
needed to fulfill the Rust SemVer requirements.

[1] https://lore.kernel.org/r/CACMJSes5+vT=NBqSe7xpSEPAEMmkgrZvJ8iKx7oBCKZQaGB_rg@mail.gmail.com/

Signed-off-by: Erik Schilling <erik.schilling@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>