Add missing headers

test=develop

paddle/fluid/framework/block_desc.cc

@@ -13,7 +13,11 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/framework/block_desc.h"
+
 #include <queue>
+#include <unordered_set>
+#include <utility>
+
 #include "paddle/fluid/framework/operator.h"
 #include "paddle/fluid/framework/program_desc.h"
 

paddle/fluid/imperative/layer.cc

@@ -18,6 +18,7 @@
 #include <limits>
 #include <map>
 #include <random>
+#include <unordered_set>
 #include <utility>
 
 #include "paddle/fluid/framework/lod_tensor.h"

paddle/fluid/imperative/tracer.cc

@@ -14,7 +14,10 @@
 
 #include "paddle/fluid/imperative/tracer.h"
 
+#include <memory>
 #include <set>
+#include <unordered_map>
+#include <unordered_set>
 
 #include "paddle/fluid/operators/math/math_function.h"
 #include "paddle/fluid/platform/device_context.h"