Try system QEMU

.github/workflows/build.yml

@@ -143,15 +143,6 @@ jobs:
           restore-keys: |
             ${{ runner.OS }}-rust-${{ env.rustc_hash }}
 
-      - name: Cache QEMU binary
-        id: cache-qemu-binary
-        uses: actions/cache@v2
-        with:
-          path: qemu
-          key: ${{ runner.OS }}-qemu
-          restore-keys: |
-            ${{ runner.OS }}-qemu
-
       - name: Install Rust ${{ matrix.toolchain }} with target (${{ matrix.target }})
         uses: actions-rs/toolchain@v1
         with:
@@ -181,16 +172,9 @@ jobs:
           use-tool-cache: true
 
       - name: Install QEMU
-        if: steps.cache-qemu-binary.outputs.cache-hit != 'true'
         run: |
-          mkdir -p qemu
+          sudo apt update
-          curl -C - -L https://github.com/japaric/qemu-bin/raw/master/14.04/qemu-system-arm-2.12.0 > qemu/qemu-system-arm
+          sudo apt install -y qemu-system-arm
-          chmod +x qemu/qemu-system-arm
-
-      - name: Setup add QEMU to PATH
-        env:
-          GITHUB_WORKSPACE: ${{ github.workspace }}
-        run: echo "::add-path::${GITHUB_WORKSPACE}/qemu"
 
       - name: Run-pass tests
         run: |