[WIP] Update xlnet-large glue results

[zburning]

Description

Update xlnet-large glue results & small changes to the run_glue.py scripts.

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented

Changes

• Feature1, tests, (and when applicable, API doc)
• Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

[codecov]

Codecov Report

Merging #1104 into master will decrease coverage by 1.75%.
The diff coverage is 91.86%.

@@            Coverage Diff             @@
##           master    #1104      +/-   ##
==========================================
- Coverage   90.01%   88.25%   -1.76%     
==========================================
  Files          67       67              
  Lines        6368     6274      -94     
==========================================
- Hits         5732     5537     -195     
- Misses        636      737     +101

Impacted Files	Coverage Δ
src/gluonnlp/utils/parameter.py	83.92% <ø> (+2.57%)	⬆️
src/gluonnlp/data/utils.py	74.04% <ø> (ø)	⬆️
src/gluonnlp/utils/version.py	100% <ø> (ø)	⬆️
src/gluonnlp/model/seq2seq_encoder_decoder.py	80% <ø> (+4.61%)	⬆️
src/gluonnlp/utils/files.py	49.01% <0%> (ø)	⬆️
src/gluonnlp/model/highway.py	100% <100%> (ø)	⬆️
src/gluonnlp/model/language_model.py	98.49% <100%> (ø)	⬆️
src/gluonnlp/data/word_embedding_evaluation.py	96.94% <100%> (+4.55%)	⬆️
src/gluonnlp/data/batchify/__init__.py	100% <100%> (ø)	⬆️
src/gluonnlp/base.py	86.2% <100%> (ø)	⬆️
... and 31 more

[mli]

Job PR-1104/1 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1104/1/index.html

[mli]

Job PR-1104/3 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1104/3/index.html