[Feature Enhancement] Optimize the check codes of test_compiler. (#254)

* Optimize the check codes of test_compiler.

* Implement collecting stats for paddle.

* Refine some codes and fix support for VectorType.

* Clear codes.

* Fix test_compiler of paddle and remove collecl_stats.

* Rename test_compiler_util.py.

* Reorganize codes and logs.

* Reorganize codes.

* Fix seed of dropout.

* Apply the new tolerance.

* Fix batched testing.

* Correct the tolerance.

* Allow to specify the verified samples.

* Fix test_compiler and several sample errors.

* Add the compare of relative error.

* Remove the debugging codes.

Author: Xreki