Add version and commit information in capi config.h and use unofficial glog for Android API < 21. (#6113)

* Automatically configure the version and commit information in capi.

* Use the unofficial glog repository for building for Android (API < 21).

* WIP send recv op

* WIP send recv

* put grpc impl in details

* put grpc impl in details

* update wip

* update proto

* update proto

* update proto

* clean cmake

* wip on op implementations

* wip on op implementations

* compile ok adding ut

* wip unitest

* add extern cares for linking

* wip add ut

* working version send recv

* revert optimizer.py

* update test cmake

* add libtool to dockerfile

* update cmake dependency

* update cmake depends

* update cmake grpc depends

* fix cmake dependency

* fix compile error

* fix compile

* follow comments

* update

* update copyfrom

1. Automatically detect GPU arch by default.
2. Specify -DCUDA_ARCH_NAME=All when releasing PaddlePaddle new version

* "add nccl enforce"

* Dev

* Update comment

* Add nccl test

* Follow comments

Remove the pserver, trainer, evaluators and some useless gradientmachines when compile mobile inference library.

* User must install Paddle python package before unittest.
* Or use docker to build Paddle