Test building with QEMU

Author: tysg

.github/workflows/untrusted.yml

@@ -9,9 +9,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      # -
-      #   name: Set up QEMU
-      #   uses: docker/setup-qemu-action@v1
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
       - uses: actions/checkout@v1
       - name: Build
         run: make build-arm64