[CMakeList] flip the order of plugin vs scenecreator.
[CMakeList] flip the order of plugin vs scenecreator.

FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa