Update build.yaml

.github/workflows/build.yaml

@@ -8,13 +8,16 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        arch: [linux/386, linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/ppc64le]
 
     steps:
       - uses: actions/checkout@v2
         with:
           submodules: "recursive"
-      - name: Cache Primes
+      - name: Cache ccache
         id: cache-primes
         uses: actions/cache@v2
         with:
@@ -31,4 +34,8 @@ jobs:
           mkdir build
           cd build
           CXXFLAGS="-stdlib=libc++" CC=/usr/bin/clang-10 CXX=/usr/bin/clang++-10 cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=../tdlib ..
-          cmake --build . --target install
+          cmake --build . --target install -- -j4
+  - uses: actions/upload-artifact@v2
+    with:
+      name: tdlight
+      path: tdlib/libtdjson.so