add jsDoc style comments for opts constructor arg
add jsDoc style comments for opts constructor arg

ethereum/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-tx,ethereumjs/ethereumjs-vm,ethereum/ethereumjs-tx,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-tx,ethereumjs/ethereumjs-vm