message: Add an ARM toolchain to CI.
diff: @@ -42,7 +42,8 @@ jobs:
  # relocation.
  - name: Build and Test
  run: |
  - sudo apt-get install binutils-riscv64-unknown-elf
  + sudo apt-get install binutils-arm-none-eabi \
  + binutils-riscv64-unknown-elf
  cd "${GITHUB_WORKSPACE}"
  echo "[target.'cfg(all())']" >> .cargo/config
  echo 'rustflags = ["-D", "warnings"]' >> .cargo/config
  