Cycles / CUDA: Better fix for missing sm_52 kernel, in case user compiles himself.
Cycles / CUDA: Better fix for missing sm_52 kernel, in case user compiles himself.

tangent-opensource/coreBlackbird,pyrochlore/cycles,pyrochlore/cycles,pyrochlore/cycles,tangent-opensource/coreBlackbird,tangent-opensource/coreBlackbird