Yeah, I'd be tempted to argue this is not our problem to fix. I remember looking at these in the past, and IIRC the issue the NVIDIA GLSL compiler is warning about exists in the original shaders. An argument could also be made that the warnings in question are a bit overzealous; ideally there would be some "#pragma optionNV()" we could use to just turn these off, although I'm not aware of one.
We do have quirk_infolog_spam(), originally created for FGLRX we could use for this...