fixed a small bug in demo build-script
fixed a small bug in demo build-script

appaquet/torch-android,quanhua92/torch-android,appaquet/torch-android,quanhua92/torch-android,appaquet/torch-android,soumith/torch-android,quanhua92/torch-android,soumith/torch-android,soumith/torch-android,quanhua92/torch-android,quanhua92/torch-android,soumith/torch-android,appaquet/torch-android,appaquet/torch-android,quanhua92/torch-android,appaquet/torch-android