[Lint] Fix cpp lint errors

Author: wweic

nnvm/src/pass/graph_annotate.cc

@@ -12,9 +12,11 @@
 #include <dlpack/dlpack.h>
 
 #include <algorithm>
+#include <memory>
 #include <queue>
 #include <stack>
 #include <unordered_map>
+#include <utility>
 #include <vector>
 
 namespace nnvm {

nnvm/src/pass/graph_annotate.h

@@ -8,6 +8,7 @@
 
 #include <nnvm/graph.h>
 
+#include <memory>
 #include <string>
 #include <unordered_map>
 

nnvm/src/pass/subgraph/subgraph_property.h

@@ -23,6 +23,7 @@
 #include <nnvm/node.h>
 #include <dmlc/base.h>
 #include <dmlc/thread_local.h>
+#include <memory>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>

nnvm/src/top/subgraph/common.h

@@ -27,8 +27,10 @@
 #include <nnvm/op_attr_types.h>
 #include <nnvm/compiler/op_attr_types.h>
 #include <nnvm/top/tensor.h>
+#include <memory>
 #include <string>
 #include <set>
+#include <utility>
 #include <vector>
 #include "../op_common.h"
 #include "../elemwise_op_common.h"

src/contrib/subgraph/subgraph.h

@@ -9,6 +9,7 @@
 
 #include <dmlc/json.h>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 namespace tvm {