pull code

Merge branch 'int8' of https://github.com/chenjiaoAngel/Paddle-Lite into int8

* add conv+conv(1x1s1p0) fusion

* fix build and run error

* fix formmat. test=develop

* enable opencl kernel tune by default. test=develop

* read-only modification of cppDesc, test=develop

* update io.cc, test=develop

* fix the code style, test=develop

* fix typo

* [LITE][XPU] accomodate crmm(variant 20200608)

* refine lite/tests/api/test_mmdnn_lite_xpu.cc

* more comments, test=develop test=xpu

* bugfix in crmm pattern match

* pr comments, test=develop test=xpu

* add XPU_CALL and retval check, test=develop test=xpu

pull

* update sequence_conv profile

* delete extra file, test=develop

Merge branch 'int8' of https://github.com/chenjiaoAngel/Paddle-Lite into int8

* add opencl valid api for device

Merge branch 'int8' of https://github.com/chenjiaoAngel/Paddle-Lite into int8

pull code

* update sequence_pool and sequence_conv profiler, test=develop

* fix compute error, test=develop

* delete warning and extra info, test=develop

* update desc interfaces, test=develop

* update desc interfaces, test=develop

* update compatible_pb.cc, test=develop

* fix build errors, test=develop

* remove the fstream to shrink the size of library, test=develop

Merge branch 'int8' of https://github.com/chenjiaoAngel/Paddle-Lite into int8