triage binary ninja backend failures

[williballenthin]

from capa-testfiles, these files fail to process today:

failures for binja:                                                                                                                                                         
  - 0761142efbda6c4b1e801223de723578.dll_                                                                                                                                   
  - 1038a23daad86042c66bfe6c9d052d27048de9653bde5750dc0f240c792d9ac8.elf_                                                                                                   
  - 112f9f0e8d349858a80dd8c14190e620.exe_                                                                                                                                   
  - 253309d8b3675d3cc61d4bf23aa15d4b.dll_                                                                                                                                   
  - 2dae11cc5f86f5399b560b8837c26274b7e09431deed669b0844fef44e917915.exe_                                                                                                   
  - 2f7f5fb5de175e770d7eae87666f9831.elf_                                                                                                                                   
  - 3b13b6f1d7cd14dc4a097a12e2e505c0a4cff495262261e2bfc991df238b9b04.dll_                                                                                                   
  - 4122acca2f9ea98fc3f3ad040688e4ce.exe_                                                                                                                                   
  - 44d40faf3f1fe4ed969befab7afcd2f0.exe_                                                                                                                                   
  - 49a34cfbeed733c24392c9217ef46bb6.exe_                                                                                                                                   
  - 54390bda109aab7fc006b8b4ead5b6c2.dll_                                                                                                                                   
  - 55d77ab16377a8a314982f723fcc6fae.exe_                                                                                                                                   
  - 5f66b82558ca92e54e77f216ef4c066c.exe_                                                                                                                                   
  - 5fbbfeed28b258c42e0cfeb16718b31c.exe_                                                                                                                                   
  - 648fc498110b11b4313a47a776e6ba40.exe_                                                                                                                                   
  - 6cc148363200798a12091b97a17181a1.exe_                                                                                                                                   
  - 7f15b1a47bbe031334e23653879e9661f4b8cde80c307548328fdd3aed87ca46.exe_                                                                                                   
  - 91a12a4cf437589ba70b1687f5acad19.exe_                                                                                                                                   
  - 92d8ea10ea30e8b534334a1c9857a455.exe_
  - 94d3c854aadbcfde46b2f82801015c31.exe_
  - 971e599e6e707349eccea2fd4c8e5f67.exe_
  - 9b7ccaa2ae6a5b96e3110ebcbc4311f6.dll_
  - 9ff8e68343cc29c1036650fc153e69f7.exe_
  - a74ee8200aace7d19dee79871bbf2ed3.exe_
  - a933a1a402775cfa94b6bee0963f4b46.dll_
  - b5f0524e69b3a3cf636c7ac366ca57bf5e3a8fdc8a9f01caf196c611a7918a87.elf_
  - c3341b7dfbb9d43bca8c812e07b4299f.exe_
  - e87076a1182ba40758e1d7258442c1ee23bf71ac77fad9f3babc707dce11c144.exe_
  - eaad7dfc78304b977d3844cc63577152.exe_
  - ee3b869b668abec332d07c66d1a39f6dbf3a598cc1325b57a0504f8d24ac2e28.dll_
  - kernel32.dll_
  - mimikatz.exe_