Optimize gelu operation with mkl erf

[yihuaxu]

According to the performance status of Bert model, optimized GELU operator to accelerate the data processing.

Platform: Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz
Model Path: third_party/inference_demo/bert_emb128/model
Batch Size: 1
Command: ./paddle/fluid/inference/tests/api/test_analyzer_bert --infer_model=third_party/inference_demo/bert_emb128/model/ --infer_data=third_party/inference_demo/bert_emb128/data.txt --gtest_filter=Analyzer_bert.profile --paddle_num_threads=1 --repeat=1 --batch_size=1 --test_all_data --profile
Data Source: third_party/inference_demo/bert_emb128/data.txt.

Associated with: PR#15770
PR#15871
Fix the memcpy@GLIBC_2.14 link issue of mklml library.

The following is the comparison with the different scenarios.

[yihuaxu]

start a review

[yihuaxu]

@panyx0718 Please help us review this PR since the cmake file was changed. so it need your approval.

[09:42:28] ++ grep cmake/external
[09:42:28] + API_CHANGE=cmake/external/mklml.cmake
[09:42:28] + echo 'checking cmake/external change, PR: 15931, changes: cmake/external/mklml.cmake'
[09:42:28] + '[' cmake/external/mklml.cmake ']'
[09:42:28] + '[' 15931 '!=' '' ']'
[09:42:28] ++ curl -H 'Authorization: token 95a329e820eeae12c4c5c8a0b6e3e39654dc01a4' 'https://api.github.com/repos/PaddlePaddle/Paddle/pulls/15931/reviews?per_page=10000'
[09:42:28] ++ python /paddle/tools/check_pr_approval.py 1 2887803
[09:42:28] % Total % Received % Xferd Average Speed Time Time Time Current
[09:42:28] Dload Upload Total Spent Left Speed
[09:42:28]
[09:42:28] 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
[09:42:29] 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
[09:42:29] 100 5 100 5 0 0 3 0 0:00:01 0:00:01 --:--:-- 3
[09:42:29] 100 5 100 5 0 0 3 0 0:00:01 0:00:01 --:--:-- 3
[09:42:29] + APPROVALS=FALSE
[09:42:29] + echo 'current pr 15931 got approvals: FALSE'
[09:42:29] + '[' FALSE == FALSE ']'
[09:42:29] + echo 'You must have panyx0718 approval for the api change! cmake/external'
[09:42:29] + exit 1
[09:42:43] Process exited with code 1

[panyx0718]

rerun? cmake file no longer need my review

[yihuaxu]

rerun? cmake file no longer need my review

Yes, as mklml library's compatible issue, so update it. thanks for your help!

[luotao1]

LGTM