Fix a subtle bug, cmd in Popen need to be a list not str
Fix a subtle bug, cmd in Popen need to be a list not str

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