Ignore "mismatched end line" errors in lcov

These seem to be caused by bugs somewhere in the chain and actually
chasing them down seems like a lot of work.

Author: dvdkon

.github/workflows/coverage_tests.yml

@@ -70,7 +70,7 @@ jobs:
       - name: Prepare coverage report
         run: |
           cd build_coverage_lnx
-          lcov --directory . --capture --output-file coverage.info
+          lcov --directory . --capture --ignore-errors mismatch --output-file coverage.info
           lcov --remove coverage.info '*/tests/*' '/usr/*' '*googletest/*' '*/3rdparty/*' --output-file coverage.info
           lcov --list coverage.info