Added lcov cleanup step

.github/workflows/build.yml

@@ -20,15 +20,15 @@ jobs:
         sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 10
     - name: Build and unit test
       run: |
-        NUMPROC=2 CMAKE_CXX_FLAGS="--coverage -fno-inline" make debug
-        make test
+        NUMPROC=2 CMAKE_CXX_FLAGS="--coverage -fno-inline" make test
     - name: Run coverage
       run: |
-        lcov --no-external --directory src -c -d debug -o coverage.info
-        lcov -l coverage.info
+        lcov -c -d debug -o coverage.info
+        lcov -e coverage.info "$PWD/src/*" -o coverage-src.info
+        lcov -l coverage-src.info
     - name: Upload coverage
       uses: codecov/codecov-action@v2
       with:
-        files: coverage.info
+        files: coverage-src.info
         name: clang-uml
         fail_ci_if_error: true