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).

The engine library need to link paddle_pserver and paddle_network on linux.

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

Recover the mistakenly deleted WARPCTC variable in cmake.

hidden capi symbols

Fix #2567