Support ARM64 filter

[powellnorma]

7z seems to sometimes chose this new ARM64 filter even when no ARM64 files get archived (a false positive of the heuristic 7z uses, I guess).

More context: https://superuser.com/q/1792413

Currently, the sevenzip library fails to decompress such files, saying unsupported compression algorithm.

[bodgit]

Correct, it's not currently supported. There's support for ARM executables, but not ARM64. I hadn't seen that filter in the source.

If you can point me to the reference source I can take a look.