add android ci

Author: nathanfallet

.github/workflows/build.yml

@@ -76,3 +76,9 @@ jobs:
       env:
         SPM: run
       run: ./run-tests.sh
+  build-android:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Run tests
+      uses: skiptools/swift-android-action@v2