BUG: made CudaDriverFrontend destructor virtual
BUG: made CudaDriverFrontend destructor virtual

Former-commit-id: ecc8483ce9501913243fe4074304d5fe6b4e6b89
gtcasl/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot