set correct attr for bias op in fc layer

python/paddle/v2/framework/layer_helper.py

@@ -139,7 +139,9 @@ class LayerHelper(object):
             type='elementwise_add',
             inputs={'X': [input_var],
                     'Y': [b]},
-            outputs={'Out': [tmp]})
+            outputs={'Out': [tmp]},
+            # for rowwise add, we should set axis 1
+            attr={'axis': 1})
         return tmp
 
     def append_activation(self, input_var):