* change the cmake and apis of lite engine, test=develop

* change the cmake of lite engine, test=develop

* change the function in op_teller, test=develop

* correct the commit-id, test=develop

* modify lite commit id to support var_conv_2d cascade. test=develop

* modify lite commit id. test=develop

* update external lite, test=develop

* switch WITH_TESTING to OFF, test=develop

修改了依赖lite的commit id：lite支持了var_conv_2d的级联使用

- 添加了fluid-lite子图方式运行resnet的单测
- 修改了依赖Lite的git commit id