Minor ELF improvements

[Schamper]

Closes #30.

[codecov]

Codecov Report

Attention: Patch coverage is 96.42857% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.33%. Comparing base (4ff3e9f) to head (97e5fb0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/executable/elf/elf.py	96.42%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   92.48%   92.33%   -0.16%     
==========================================
  Files           5        5              
  Lines         306      300       -6     
==========================================
- Hits          283      277       -6     
  Misses         23       23              

Flag	Coverage Δ
unittests	92.33% <96.42%> (-0.16%)	⬇️

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