clean coverage file first

Author: frs69wq

.github/workflows/build.yml

@@ -71,6 +71,7 @@ jobs:
           sudo make install
           make -j4 unit_tests
           ./unit_tests
+          lcov --remove coverage.info '*/test/*' '*/include/*'
           lcov --directory . --capture --output-file coverage.info
           lcov --remove coverage.info '*/test/*' '*/include/*'
           bash <(curl -s https://codecov.io/bash) -f coverage.info -t ${CODECOV_TOKEN}