Use per module hashes to track consistency. #10
Description
Currently a hash is emitted in the generated code, which seems to depend on the whole of the input file. As it is sometimes necessary to place generated files in version control, this is somewhat inconvenient. It would be preferable if the hash only depended on the module, so modifying one of the coverage collection modules would not affect the other output files. I don't think there is anything fundamental preventing us from doing this, but correct me if I missed something.