Add missing build dependencies

.github/workflows/ci.yml

@@ -34,6 +34,11 @@ jobs:
       - uses: actions/checkout@v2
       - name: Install dependencies
         run: |
+          if [[ -n "$encrypted_d27e803291ff_iv" ]]; then
+            openssl aes-256-cbc -K $encrypted_d27e803291ff_key -iv $encrypted_d27e803291ff_iv -in scripts/setup-keys.enc -d >> gradle.properties;
+          fi
+          apt-get update
+          apt-get install -y ninja-build
           pushd $HOME
           git clone --depth 1 https://github.com/facebook/buck.git
           cd buck