message: ci: Ensure that the correct compiler is installed
  Ensure that a compiler is installed when the aarch64 CI build is run.
diff: @@ -5,6 +5,8 @@ env:
  - TARGET=x86_64-unknown-redox
  rust:
  - nightly
  +install:
  + - if [ $TARGET == "aarch64-unknown-linux-gnu" ]; then sudo apt-get install gcc-aarch64-linux-gnu; fi
  before_script:
  - rustup component add rustfmt-preview
  - if [ -n "$TARGET" ]; then rustup target add $TARGET; fi
  