Add checker for radare2

[SaurabhK122]

No description provided.

[codecov-commenter]

Codecov Report

Merging #693 into master will increase coverage by 7.30%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #693      +/-   ##
==========================================
+ Coverage   80.63%   87.93%   +7.30%     
==========================================
  Files          70       71       +1     
  Lines        2205     2213       +8     
  Branches      285      285              
==========================================
+ Hits         1778     1946     +168     
+ Misses        358      201     -157     
+ Partials       69       66       -3     

Flag	Coverage Δ
#longtests	87.93% <100.00%> (+7.30%)	⬆️

Impacted Files	Coverage Δ
cve_bin_tool/checkers/__init__.py	100.00% <ø> (ø)
test/test_scanner.py	92.20% <ø> (+9.09%)	⬆️
cve_bin_tool/checkers/radare2.py	100.00% <100.00%> (ø)
cve_bin_tool/VersionSignature.py	87.23% <0.00%> (-2.13%)	⬇️
cve_bin_tool/extractor.py	64.10% <0.00%> (+2.56%)	⬆️
cve_bin_tool/cli.py	83.10% <0.00%> (+5.51%)	⬆️
test/test_cli.py	100.00% <0.00%> (+17.94%)	⬆️
cve_bin_tool/checkers/xml2.py	88.63% <0.00%> (+27.27%)	⬆️
... and 2 more

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