ECC NIST P-384 key taken from
https://sites.google.com/site/brainhub/pgpecckeys

The sample key has ECDSA top key 0x098033880F54719F and a single ECDH
encryption subkey 0xAA8B938F9A201946. ECDH subkey uses SHA-384 and
AES-256 with KDF. The password for the key is "ecc".

-----BEGIN PGP PRIVATE KEY BLOCK-----
Version: PGP Command Line v10.0.0 (Linux)
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=a4k3
-----END PGP PRIVATE KEY BLOCK-----