Fix pkgconfig setting to link with pkg-config

[ami-GS]

Description

apt-get install pkg-config affects linking of libcrypto.so. arm build tries to link x86-64's libcrypto.so
This environment variable assists pkg-config to search right directory.

Testing

tested with commit da24f2d with this change.
Works fine.

Documentation

Is there any documentation impact for this change?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.16%. Comparing base (e7b897d) to head (717ee33).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4225      +/-   ##
==========================================
- Coverage   84.15%   83.16%   -0.99%     
==========================================
  Files          56       56              
  Lines       15358    15358              
==========================================
- Hits        12924    12773     -151     
- Misses       2434     2585     +151     

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