message: `make setup`: Add the nrf52's target to the stable toolchain so test-stable works.
diff: @@ -42,6 +42,7 @@ setup: setup-qemu
  cargo install elf2tab
  cargo install stack-sizes
  cargo miri setup
  + rustup target add --toolchain stable thumbv7em-none-eabi
  # Sets up QEMU in the tock/ directory. We use Tock's QEMU which may contain
  # patches to better support boards that Tock supports.
  