fs-verity signing
=================
With a key pair, fs-verity signature can be generated by simply running
`fsverity_metadata_generator` command line tool, which uses
[fsverity-utils](https://git.kernel.org/pub/scm/fs/fsverity/fsverity-utils.git)

```
fsverity_metadata_generator --fsverity-path {fsverity_path} --key key.pem --key-format pem \
    --cert cert.pem --signature pkcs7 --output test.data.fsv_meta test.data
```