gcc-cross-canadian: Add nativesdk-zstd dependency

To match the changes to gcc-cross, add a nativesdk-zstd dependency to ensure
our configurations match.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit c145e007)
Signed-off-by: Steve Sakoman <steve@sakoman.com>