SofaCUDA: fixing nvcc flags. But there is still a problem, these flags are setted to compile SofaCUDA, but not the other plugins needing CUDA.
SofaCUDA: fixing nvcc flags. But there is still a problem, these flags are setted to compile SofaCUDA, but not the other plugins needing CUDA.

Former-commit-id: ab53950d23f22a25157262521084bbf095e1aa4d
FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,Anatoscope/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa