GraphScope 1/3: Enable macos compatibility

[sighingnow]

The rebase & merge graphscope task will include three pull requests to make code review easier:

• handling platform compatibility issues, especially for MacOS and using pre-installed packages as dependencies
• add the graphscope storage implementation based on vineyard
• revisit python API / examples and testing

This pull request is the first one of the patch series, includes:

• necessary cmake to find dependencies
• pthread compatibility layer for MacOS
• removing the usages of tr1 as we have already moved to C++14 in CMakeLists.txt
• fixes the double-initialization/destruction bug in glog's logger

[goldenleaves]

I think that it is better to put this cmake folder in the upper directory, because thrid parties are currently being sharedby graphlearn module and dgs module.

[sighingnow]

I think that it is better to put this cmake folder in the upper directory, because thrid parties are currently being sharedby graphlearn module and dgs module.

Okay

[goldenleaves]

LGTM

[Seventeen17]

LGTM