libFuzzer, entropic patch.diff is causing crashes on "No such file or directory" when provided with seed inputs

E.g. run
`make run-libfuzzer-matio_matio_fuzzer`

You will see a crash

```
8851: cov: 137 ft: 190 corp: 38 exec/s 110 oom/timeout/crash: 7/0/0 time: 36s job: 8 dft_time: 0
No such file or directory: ��hg; exiting
Traceback (most recent call last):
File "", line 1, in
File "/out/fuzzer.py", line 44, in fuzz
extra_flags=['-keep_seed=1', '-cross_over_uniform_dist=1'])
File "/out/fuzzer.py", line 76, in run_fuzzer
subprocess.check_call(command)
File "/usr/local/lib/python3.7/subprocess.py", line 363, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/out/matio_fuzzer', '-print_final_stats=1', '-close_fd_mask=3', '-fork=1', '-ignore_ooms=1', '-ignore_timeouts=1', '-ignore_crashes=1', '-detect_leaks=0', '-keep_seed=1', '-cross_over_uniform_dist=1', '/out/corpus', '/out/seeds']' returned non-zero exit status 1.
ERROR:root:Executed command: "nice -n 5 python3 -u -c import fuzzer; fuzzer.fuzz('/out/seeds', '/out/corpus', '/out/matio_fuzzer')" returned: 1.
ERROR:root:Fuzz process returned nonzero. Extras: {'traceback': 'Traceback (most recent call last):\n File "/src/experiment/runner.py", line 224, in run_fuzzer\n env=fuzzer_environment)\n File "/src/common/new_process.py", line 124, in execute\n raise subprocess.CalledProcessError(retcode, command)\nsubprocess.CalledProcessError: Command \'[\'nice\', \'-n\', \'5\', \'python3\', \'-u\', \'-c\', "import fuzzer; fuzzer.fuzz(\'/out/seeds\', \'/out/corpus\', \'/out/matio_fuzzer\')"]\' returned non-zero exit status 1.\n'}
```

This is blocking the work on trying to run an experiment with OSS-Fuzz corpora on all benchmarks to see if they can break the coverage wall.