abi test problems

The abi test fails with an unclear error when run on the media_stage head. I am not sure how it is supposed to work in media-ci: in my build scripts it will compare the output to an existing abi file, and fail if abi-compliance-checker sees a problem. After that you need to manually check what happened.

The problem is that you need to manually update the reference abi dump files if the abi changes were valid (i.e. a new struct was added).

Another issue is that my build script had a bug where it compared the old dump file with itself instead of with the new dump file, so that test hasn't worked properly for a very long time :-( This is now fixed, and it doesn't appear to be in the media-ci version, luckily.

Perhaps the abi reference files should be committed in media-ci and only updated when the ABI changes are validated?

Alternatively, it might be easier to drop the abi dumper test for now, especially since it has been broken for such a long time.