Fix cache and artifacts

.github/workflows/build.yaml

@@ -14,6 +14,11 @@ jobs:
         arch: [linux/386, linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/ppc64le]
 
     steps:
+      - name: Setup variables
+        run: |
+          ARCH=${{ matrix.arch }}
+          SAFE_ARCH=$(echo $ARCH | sed 's/\//\-/')
+          echo "SAFE_ARCH=$SAFE_ARCH" >> $GITHUB_ENV
       - name: Install sudo package
         run: |
           (apt-get update || true) 2>/dev/null
@@ -23,13 +28,13 @@ jobs:
         with:
           submodules: "recursive"
       - name: Cache ccache
-        id: cache-primes
+        id: cache-ccache
         uses: actions/cache@v2
         with:
           path: ~/.ccache
-          key: ${{ runner.os }}-ccache-all
+          key: ${{ runner.os }}-${{ env.SAFE_ARCH }}-ccache-all
           restore-keys: |
-            ${{ runner.os }}-ccache-
+            ${{ runner.os }}-${{ env.SAFE_ARCH }}-ccache-
       - name: Install build tools
         run: sudo apt-get install -y make git zlib1g-dev libssl-dev gperf php-cli cmake clang-6.0 libc++-dev libc++abi-dev ccache
       - name: Build
@@ -40,6 +45,6 @@ jobs:
           cmake --build . --target install -- -j4
       - uses: actions/upload-artifact@v2
         with:
-          name: tdlight-${{ matrix.arch }}
+          name: tdlight-${{ env.SAFE_ARCH }}
           path: tdlib/lib