riscv readlinkat fixes

[marcoSanti]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.16%. Comparing base (d3f1e1b) to head (9940333).
⚠️ Report is 1 commits behind head on capio-v2.

Files with missing lines	Patch %	Lines
src/posix/utils/filesystem.hpp	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           capio-v2     #160      +/-   ##
============================================
- Coverage     41.18%   41.16%   -0.02%     
============================================
  Files            80       80              
  Lines          4390     4392       +2     
  Branches       2620     2621       +1     
============================================
  Hits           1808     1808              
- Misses         1165     1194      +29     
+ Partials       1417     1390      -27     

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