Update buildcommit.yml

Author: kristjanvalur

.github/workflows/buildcommit.yml

@@ -82,3 +82,20 @@ jobs:
         with:
           name: win_${{ matrix.platform }}
           path: lib/win_${{matrix.platform}}/stackman.lib
+  
+  commit-artifacts:
+    runs-on: ubuntu-latest
+    needs: [build-linux-gnu, build-windows]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/download-artifact@v2
+      with:
+        path: lib
+        
+    - name: Commit changes
+      run: |
+        git config --global user.name 'Automation tool'
+        git config --global user.email 'automation-tool@users.noreply.github.com'
+        git add lib/*.a lib/*.lib
+        git diff-index --quiet HEAD || git commit -m "Automated build"
+