fix: improve tcpdump checker

[ffontaine]

Update checker to avoid false positives (e.g. with qemu)

Signed-off-by: Fabrice Fontaine fabrice.fontaine@orange.com

[codecov-commenter]

Codecov Report

Merging #2600 (f38ca3b) into main (3bb7bf9) will decrease coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2600      +/-   ##
==========================================
- Coverage   82.02%   81.73%   -0.30%     
==========================================
  Files         600      600              
  Lines        9872     9872              
  Branches     1353     1353              
==========================================
- Hits         8098     8069      -29     
- Misses       1418     1449      +31     
+ Partials      356      354       -2     

Flag	Coverage Δ
longtests	81.73% <ø> (+0.23%)	⬆️
win-longtests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cve_bin_tool/checkers/tcpdump.py	100.00% <ø> (ø)
test/test_data/qemu.py	100.00% <ø> (ø)
test/test_json.py	68.96% <0.00%> (-20.69%)	⬇️
cve_bin_tool/extractor.py	69.02% <0.00%> (-11.51%)	⬇️
cve_bin_tool/version_scanner.py	86.95% <0.00%> (-2.49%)	⬇️
test/test_cli.py	85.81% <0.00%> (-2.13%)	⬇️
test/test_checkers.py	93.54% <0.00%> (-1.62%)	⬇️
cve_bin_tool/output_engine/__init__.py	67.85% <0.00%> (-1.08%)	⬇️
cve_bin_tool/merge.py	79.83% <0.00%> (-0.81%)	⬇️
cve_bin_tool/async_utils.py	93.79% <0.00%> (-0.69%)	⬇️
... and 8 more

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[terriko]

Thanks!