Fix constant folding in case where lhs of assign has list.
Fix constant folding in case where lhs of assign has list.

stuartarchibald/numba,pombredanne/numba,jriehl/numba,shiquanwang/numba,stonebig/numba,sklam/numba,sklam/numba,gmarkall/numba,GaZ3ll3/numba,cpcloud/numba,seibert/numba,ssarangi/numba,shiquanwang/numba,ssarangi/numba,jriehl/numba,gdementen/numba,pitrou/numba,cpcloud/numba,gmarkall/numba,sklam/numba,numba/numba,seibert/numba,jriehl/numba,ssarangi/numba,stonebig/numba,sklam/numba,cpcloud/numba,stonebig/numba,ssarangi/numba,gmarkall/numba,pombredanne/numba,pitrou/numba,GaZ3ll3/numba,stuartarchibald/numba,seibert/numba,stuartarchibald/numba,stefanseefeld/numba,stuartarchibald/numba,numba/numba,pitrou/numba,stonebig/numba,pombredanne/numba,IntelLabs/numba,gdementen/numba,gmarkall/numba,stefanseefeld/numba,gdementen/numba,GaZ3ll3/numba,IntelLabs/numba,gdementen/numba,stefanseefeld/numba,jriehl/numba,cpcloud/numba,numba/numba,GaZ3ll3/numba,seibert/numba,pombredanne/numba,IntelLabs/numba,sklam/numba,pitrou/numba,IntelLabs/numba,IntelLabs/numba,shiquanwang/numba,numba/numba,numba/numba,stuartarchibald/numba,GaZ3ll3/numba,stonebig/numba,jriehl/numba,gdementen/numba,stefanseefeld/numba,pombredanne/numba,pitrou/numba,gmarkall/numba,ssarangi/numba,cpcloud/numba,stefanseefeld/numba,seibert/numba