remove legacy any.cmake

remove Legacy compiler option

fix default value in compiler.py

test=develop

fix bug when op node has no block pointer

Fix compile warning

test=develop

* fix warnings

test=develop

* fix enforce test

test=develop

Fix shape api doc

test=develop

test=develop

test=develop, update protobuf

refine fused emb seq pool

Fix pybind api arg0

test=develop

* Enable cross_entropy operator for a ngraph engine
test=develop

* Update tests
test=develop

* Added PADDLE_ENFORCE for the batch_norm operator
test=develop

* Update the message about which format are supported right now
test=develop

* Correct the comment in control_flow.py.

* Correct the argument list of ops.
test=develop

* Update API.spec.
test=develop

* Skip op_callstack attr for all op apis.
test=develop

* Remove use_mkldnn and is_test from python api.
test=develop

* Remove use_mkldnn and is_test from op_proto_maker and hard-coding them in python when generating doc string.
test=develop

test=develop

test=release/1.3

test=release/1.3

Fix FtrlOptimizer's API comment

test=develop

cherry picked modifies.