CI: Upload build artifacts even on build failure

Helpful when CI times out or building a large number of packages for testing and it fails

.github/workflows/packages.yml

@@ -137,6 +137,9 @@ jobs:
           ./scripts/run-docker.sh ./build-package.sh -I -a ${{ matrix.target_arch }} $(cat ./built_packages.txt)
         fi
 
+    - name: Generate build artifacts
+      if: always()
+      run: |
         mkdir -p debs
         test -d termux-packages/output && mv termux-packages/output/* ./output/
 
@@ -158,9 +161,11 @@ jobs:
         # Archiving *.deb files in a tarball to avoid issues with uploading.
         tar cf artifacts/debs-${{ matrix.target_arch }}-${{ github.sha }}.tar debs
     - name: Checksums for built *.deb files
+      if: always()
       run: |
         find debs -type f -name "*.deb" -exec sha256sum "{}" \; | sort -k2
     - name: Store *.deb files
+      if: always()
       uses: actions/upload-artifact@v2
       with:
         name: termux-packages-${{ matrix.target_arch }}-${{ github.sha }}