[pytorch] Fixes detecting wrong flavor on macOS issue

[frankfliu]

Description

Brief description of what this PR is about

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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 60.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 72.28%. Comparing base (063fb8d) to head (8d3ee44).

Files	Patch %	Lines
...ine/src/main/java/ai/djl/pytorch/jni/LibUtils.java	60.00%	3 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3027      +/-   ##
============================================
- Coverage     72.30%   72.28%   -0.02%     
+ Complexity     7292     7291       -1     
============================================
  Files           722      722              
  Lines         32499    32508       +9     
  Branches       3392     3395       +3     
============================================
+ Hits          23499    23500       +1     
- Misses         7382     7387       +5     
- Partials       1618     1621       +3     

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