make filename length hard limit

[reox]

resolves #744

[codecov-io]

Codecov Report

Merging #752 into master will decrease coverage by <.01%.
The diff coverage is 81.81%.

@@            Coverage Diff             @@
##           master     #752      +/-   ##
==========================================
- Coverage    73.5%   73.49%   -0.01%     
==========================================
  Files          51       51              
  Lines       16177    16177              
==========================================
- Hits        11891    11890       -1     
- Misses       4286     4287       +1

Impacted Files	Coverage Δ
androguard/misc.py	61% <100%> (-1%)	⬇️
tests/test_misc.py	92.5% <50%> (ø)	⬆️

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