This PR fixes a couple of issues with the opencv package, mostly in
relation to cuda. This is only focused on cuda, not any of the other
variants.
- Added versions to the contrib_vers list. Added for all that can be
retrieved from github. The one for the latest version was missing.
- Added a cmake patch for v3.2.0.
- Deprecated versions 3.1.0 and 3.2.0 as neither of those could be
built, with or without cuda.
- Adjusted constraints on applying initial cmake patch.
- Added cudnn dependency when +cuda.
- Set constraints for cudnn and cuda for older versions of opencv.
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