s2n-bignum build should use boringssl_prefix_symbols_asm.h

[justsmth]

Related:

• [DRAFT] Prefix all symbols from AWS-LC aws-lc-rs#729

Description of changes:

MacOS assembly required the use of boringssl_prefix_symbols_asm.h

Call-outs:

• For other platforms this is equivalent to boringssl_prefix_symbols.h

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.03%. Comparing base (aa43a85) to head (487b2b4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2265   +/-   ##
=======================================
  Coverage   79.02%   79.03%           
=======================================
  Files         612      612           
  Lines      106588   106588           
  Branches    15082    15084    +2     
=======================================
+ Hits        84232    84241    +9     
+ Misses      21703    21693   -10     
- Partials      653      654    +1     

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