Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle-Lite into conv_dw

pull code

* [ARM] Add op pixel_shuffle for arm kernel. test=develop

* Delete OpenMP pragma clause

Delete OpenMP pragma clause because openmp not support well for now on windows and Mac OS.

* Just trigger CI. test=develop

* [LITE][BM] Fixed dependency path issues for compiling third-party libraries. test=develop

* Update CMakeLists.txt

* add new ops for ernie, test=develop

* drop lookuptable, test=develop

* update cast compute, test=develop

* add slice gather op, test=develop

test=develop test=xpu

* optimize conv_dw profiler

* fix build conv_dw_3x3s1 bug

* update conv_dw_3x3s2

* fxi foormat test=develop

* fix compute error

* fix format, test=develop

test=develop,test=document_fix

* speed up vector assignment, test=develop

* update op_desc with c-string, test=develop

* add transpose reshape flatten op, test=develop

* address review comments, test=develop