Add fuzz inputs #262

C.f. last one: #252

mv fuzz_corpora fuzz_inputs_moved
../b-c/bld-cmake/test/fuzz/test_runner.py -l DEBUG --par $( nproc ) --m_dir ./fuzz_inputs_moved/  --m_dir ./results_from_working_farm --m_dir ../etc/... ./fuzz_corpora
git restore -- ./fuzz_corpora
git add ./fuzz_corpora
git commit -m "Add fuzz inputs"

main: https://drahtbot.space/host_reports/DrahtBot/reports/coverage_fuzz/monotree/b97abdcdf1396f2c/a4029428adb3f94d/fuzz.coverage/index.html

this pull: https://drahtbot.space/host_reports/DrahtBot/reports/coverage_fuzz/monotree/b97abdcdf1396f2c/687c9922722cfd01/fuzz.coverage/index.html

So looks like a mild/nice coverage increase. I'll probably merge this soon