2, Add imagination/Imagination/IMAGINATION prefix for symbol definition;
3, No build error

1, Remove a paragraph at the end of lite/CMakeLists.txt, otherwise build
fails with original developbranch on Ubuntu 18.04;
2, Add NNA support, build light library successfully;
3, Full build, library ok, but apps such as benchmark_bin failed

* [ASCEND] Add Huawei Ascend310 support, test=develop

* [ASCEND] fix some typos, test=develop

* [ASCEND] address comments and fix opt ci python file, test=develop

* [ASCEND] update based on new ascend env, test=develop

* [ASCEND] update after develop merge, test=develop

* reduce .so size. test=develop

* compile all targets when LITE_ON_TINY_PUBLISH=OFF

* unordered_map is more convenient when key is customized class

* test=develop

[MLU] add some basic support for MLU, including related passes, kernels, gtests and some api in padddle_api.h
Passes：mlu_subgraph_pass ,mlu_postprocess_pass
Kernels:  act，batch_norm, concat, conv, elementwise, fc, interpolate, pool, scale, softmax

* add 3 layout for opencl image. test=develop

Add 'inference' folder into build.lite.x86, 'inference' folder contains head files、library files and demo of x86 compiling (#2301)

Add inference folder into build.lite.x86, build.lite.x86/inference folder contains head files、library files and demo of x86 compiling

* [python api] add armlinux supported and publish paddle-lite python lib & demo

* add cuda build
test=develop

* [python api] init add python api test=develop