Fix disassemble_cubin on Python 3.6
Fix disassemble_cubin on Python 3.6

numba/numba,IntelLabs/numba,stonebig/numba,numba/numba,cpcloud/numba,stuartarchibald/numba,sklam/numba,IntelLabs/numba,gmarkall/numba,gmarkall/numba,stonebig/numba,stuartarchibald/numba,stonebig/numba,gmarkall/numba,seibert/numba,stuartarchibald/numba,gmarkall/numba,seibert/numba,IntelLabs/numba,sklam/numba,stonebig/numba,sklam/numba,numba/numba,seibert/numba,seibert/numba,IntelLabs/numba,cpcloud/numba,numba/numba,stonebig/numba,cpcloud/numba,gmarkall/numba,stuartarchibald/numba,IntelLabs/numba,sklam/numba,seibert/numba,cpcloud/numba,sklam/numba,numba/numba,cpcloud/numba,stuartarchibald/numba