try upload coverage to codecov.io

.gitlab-ci.yml

@@ -159,6 +159,7 @@ coverage: # special manual job to run after normal pipeline finished
     - ctest -j4 -V > test.log 
     - cmake --build . --target coverage
     - tar czf coverage-report.tar.gz coverage-report
+    - export CODECOV_TOKEN=28199a2aeb3e4194bfc88d0afc6b7332 && curl -s https://codecov.io/bash | bash -s - -f coverage.info -X gcov -x gcov
   coverage: '/functions.*\s+(\d+\%)\s/'
   artifacts:
     expire_in: 1 year