Enable rust build, which is currently disabled in debian/rule
with NO_RUST=true.

Dependencies available in Debian: librust-byteorder-dev librust-rpassword-dev
librust-either-dev librust-errno-dev librust-itertools-dev librust-getset-dev
librust-uuid-dev librust-libudev-dev librust-libc-dev librust-anyhow-dev
librust-clap-dev librust-colored-dev librust-chrono-dev librust-log-dev
librust-atty-dev

Missing dependencies: librust-gag-dev librust-parse-display-dev
librust-bch-bindgen-dev
