Merge branch 'fix-build-activation_op' of ssh://github.com/jacquesqiao/Paddle into add-async-listen-and-serv-op

Fix CPPLint issues in tensor_util_test

Fix deadlinks in fluid documentation

* Fix CPPLint in data_device_transform_test

* Fix compilation error

* Fix compilation error

* Fix CPPLint errors in data_layout_transform_test

* Fix CPPLint errors in data_type_transform_test

* Fix CPPLint errors in data_type_transform_test.cu

* Fix compilation error

* Fix CPPLint issues in threadpool_test

* Fix CPPLInt issues in op_registry_test

* Fix CPPLint issues in operator_test

* Fix compilation error

* test

Refine listen and serve op

* Revert "accelerate dropout (#9902)"

This reverts commit 2e331c65.

* Correct discard

Fix scope of gather and broadcast, and code clean

Merge branch 'refine-listen-and-serve-op' of ssh://github.com/jacquesqiao/Paddle into add-async-listen-and-serv-op

Merge branch 'refine-listen-and-serve-op' of ssh://github.com/jacquesqiao/Paddle into add-async-listen-and-serv-op

fix reduce_op_handle_test

make for_parallel default True

"polish activation"

Add flush of program desc to update the proto information.