[ci] Publish debug symbols (#272)

Author: swift-kim

.github/workflows/build.yml

@@ -108,6 +108,13 @@ jobs:
           path: src/out/${{ env.OUTPUT_NAME }}/libflutter_*.so
           if-no-files-found: error
 
+      - uses: actions/upload-artifact@v2
+        if: github.event_name == 'push'
+        with:
+          name: tizen-${{ matrix.arch }}-${{ matrix.mode }}_symbols
+          path: src/out/${{ env.OUTPUT_NAME }}/so.unstripped/libflutter_*.so
+          if-no-files-found: error
+
       - uses: actions/upload-artifact@v2
         if: matrix.arch == 'arm' && matrix.mode == 'release'
         with: