* runable maxpool algorithm

* change namespace sci to primihub::sci

* change namespace emp to primihub::emp

* add namespace primihub::cryptflow2

* Due to lack of avx2 support, skip cryptflow2 procotol when build in mac platform, test passed in ubuntu and test needed in macos.

* Add test case for maxpool but not finish yet, there are undefined symbol during link stage.

* change configuration to make maxpool runable

* somehow solve the problem of undefined symbol

* Build logistic and maxpool test case in two bazel target, until now logistic test and maxpool test runs well.

* print the maxpool output

* Fix gmp build error.
Co-authored-by: Nshenhuajie <shenhuajie@openmpc.com>
Co-authored-by: NAdijeShen <1534656015@qq.com>
Co-authored-by: Nzhangxiangyu <zhangxiangyu@primihub.com>
Co-authored-by: zhangxiangyu@primihub.com <zxy>