Added GPU file for training
Added GPU file for training

cherryc/dynet,kamigaito/cnn,Abasyoni/dynet,Peilun-Li/dynet,Abasyoni/dynet,mitchellstern/dynet,Abasyoni/dynet,kamigaito/cnn,cherryc/dynet,cherryc/dynet,Peilun-Li/dynet,Peilun-Li/dynet,mitchellstern/dynet