* - Fix to crash of Transformer when mkldnn is to be used

Desc: TensorCopy was not setting MKLDNN primitive descriptor when layout was to be kMKLDNN

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* - Enable transformer for mkl-dnn

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* - Compilation fix

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* - Removed manual selection of MKL-DNN ops to be used in Transformer test

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add if use static engine for trt
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add if use static engine for trt
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* refine profiler && add runtime tracer

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* fix bug && test=develop

* add thread id map && test=develop

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* testing

* bug fix

* remove cuda event && refine code && test=develop

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* fix windows temp file && test=develop

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* fix windows bug && test=develop

* fix start up issue && test=develop

* code polish &&  test=develop

* remove unused code && test=develop

* add some cupti cbid && test=develop

* add FLAGS_multiple_of_cupti_buffer_size && test=develop

* fix compile error && test=develop

* add keyword && test=develop

* fix && test=develop

* code polish && test=develop

* Refine cmake's download function.
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* Set DOWNLOAD_NO_EXTRACT to 1 pure download function.
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* Fix unpack problem in ExternalProject_Add, and it seem DOWNLOAD_NO_EXTRACT option is not support in cmake-3.5.
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* fix warnings

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* fix enforce test

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Add check for it.
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* Simplify the compare op for CPU.

* Use asynchronous tensor copy in reshape_op's kernel.

* Optimize while_op for test, avoiding creating variables every time.
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* Enable the cache of kernel type and kernel function.
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* Enable profiling with gperftools.

* Remove flags for testing, and fix the linking error.
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* Delete the codes of ChooseKernel.
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* Fix bug when preparing ExecutorPrepareContext for while_op.

* Fix missing depending on grpc libraries.

* Remove the redundant print.
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* Follow comments.

* Remove the codes related to prepare the ExecutorPrepareContext for while_op.
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* disable conv3d mkldnn in dam

* Add some comments  test=develop

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