Sync with upstream Tock to have reproducible builds.

.github/workflows/boards_build.yml

boards/nordic/nrf52840_dongle_dfu/Cargo.toml

boards/nordic/nrf52840_dongle_dfu/Makefile

boards/nordic/nrf52840_dongle_dfu/build.rs

boards/nordic/nrf52840_dongle_dfu/layout.ld

boards/nordic/nrf52840_mdk_dfu/Cargo.toml

boards/nordic/nrf52840_mdk_dfu/Makefile

boards/nordic/nrf52840_mdk_dfu/build.rs

boards/nordic/nrf52840_mdk_dfu/layout.ld

boards/nordic/nrf52840_mdk_dfu/src/io.rs

boards/nordic/nrf52840_mdk_dfu/src/main.rs

boards/nrf52840_dongle_dfu/Cargo.toml

boards/nrf52840_mdk_dfu/Cargo.toml

deploy.py

patches/tock/04-additional-boards.patch

patches/tock/04-nrf52-bootloader.patch

run_desktop_tests.sh

setup.sh

third_party/tock