fix lod reset op;test=develop

paddle/fluid/operators/lod_reset_op.cc

@@ -33,6 +33,11 @@ class LoDResetOp : public framework::OperatorWithKernel {
                         "If Input(Y) not provided, the target lod should be "
                         "specified by attribute `target_lod`.");
     }
+    else
+    {
+        ctx->ShareLoD( "Y", "Out");
+    }
+
     ctx->SetOutputDim("Out", ctx->GetInputDim("X"));
   }