update

* fix: fix omp thread bug

* fix: fix compile android level & test=develop

* fix: fix omp bug

* fix: fix omp bug
test=develop

test=develop

update FPGA v2 kernel file including proposal， sigmoid and anchor generator, test=develop  Closes #2369 (#2370)

* update proposal and psroipool kernel file in FPGA V2 track

* update, test=develop

* fix step rnn model run bugs test=develop

* move some basic ops into extra type to reduce library size test=develop (#2347)

test=develop

* add mem opt option for high api ,test = develop

* fix is_lod params && test-performance ,test=develop

* fix useless init emptyimage , test = develop

* [XPU] add batchnorm op bridge and unit test

test=develop

* fix DMLC_USE_GLOG

test=develop

* delete remaining opencl headers test=develop

* checkout specific commit for opencl headers test=develop

* add opencl headers by git clone test=develop

* add opencl headers by git clone test=develop

fix buf: model_optimize_tool can not compile preperly on mac environment (#2326)

* add mem opt option for high api ,test = develop

* fix is_lod params && test-performance ,test=develop

* fix model_opt_tool bug : judge WITH_MKL to choose whether to compile MKL test=develop

* Fix conv bn bug. test=develop

* Fix bug in pattern_matcher. test=develop

* add GPU_CL for test_net_benchmark.

* test compile

* fix mobile build error

Fix compiling bug in android_armv7_demo : cxx demo can not compile properly because demo' android version is different from that of library file (#2308)

link armv7 demo to android-23 to make sure the demo can compile properly
cxx demo can not compile properly because demo' android version is different from that of library file, we fix this bug by linking armv7 demo to android-23

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

* alter the unit tests api for googlenet, resnet50, inceptionv4, mobilenetv1, mobilenetv2 and thier corresponding cmake, test=develop

* disable checks and correct some incorrect statement, test=develop

* [LOG] macro for vlog. test=develop

test=develop

* we can build x86 dynamic library by `build.sh x86`

remove dynamic library compiling from `ci_build.sh  build_test_server`

* Fix bug target for kHost and kARM not equal. test=develop

* Fix license. test=develop