* cinn 5 6

* roll back something

* roll back something

* fix codestyle of cinn

* revert symlink changes

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Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* fix cinn codestyle cmake-format

* remove a blank cmakelist

* restore deleted file

* restore deleted file

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Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* test=cinnunit

* test=cinnunit

* sync to develop of cinn

* test=cinnunit

* test=cinnunit

* feat(cmake): add cmake of cinn

* feat(cmake): add cmake of cinn python test

* feat(cmake): add jit

* feat(cmake): test/CMakeList.txt

* feat(cmake): rebase to develop

* feat(cmake): remove some flags

* fix(cmake): fix cinn's gflags depends

* feat(cmake): add ci scripts of cinn

* feat(cmake): copy code of cinn

* fix(cmake): fix cinn third_party model path

* gflags dynamic dependce

* fix ci build_demo

* tmp update to c++17 of cinn-only test

* fix cinn only with c++17