Process `gcno` files in addition to `gcda` files, but only if there is no corresponding `gcda` file.
Process `gcno` files in addition to `gcda` files, but only if there is
no corresponding `gcda` file.


kevincon/gcovr,cloudsmith-io/gcovr,cloudsmith-io/gcovr,cloudsmith-io/gcovr,thatguystone/gcovr,thatguystone/gcovr,thatguystone/gcovr,cloudsmith-io/gcovr,thatguystone/gcovr,kevincon/gcovr,kevincon/gcovr,kevincon/gcovr