Add libatomic.so.1 to lib_whitelist

[Xeonacid]

On RISC-V, GCC 12 and earlier require libatomic support for 1-byte and 2-byte operations, which have been a long and painful story. [1][2][3][4]

Users' machine definitely will have the libatomic library to make software like cpython work, so adding this should be safe.

This seems also to be an regression on cpython 3.13 with more architectures than riscv64. [5]

[1] riscvarchive/riscv-gcc#12
[2] riscvarchive/riscv-gcc#337
[3] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86005
[4] python/cpython#112779
[5] python/cpython#127708

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.37%. Comparing base (8964d1e) to head (aa3c3cc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #567      +/-   ##
==========================================
- Coverage   92.76%   90.37%   -2.40%     
==========================================
  Files          21       21              
  Lines        1755     1755              
  Branches      331      331              
==========================================
- Hits         1628     1586      -42     
- Misses         77      109      +32     
- Partials       50       60      +10     

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