accessory: script to generically generate accessory keys

All accessories leverage the key format of Hammer therefore this
script calls Hammer's one to generate a key pair and renames them.
The key name isn't referenced by the signer anymore, so we will
name them all "hammerlike".

TEST=Run this script in the chroot.

Change-Id: Iba35b03e59216e96a99f8aa471b660f3805c1f23
Commit-Ready: Nick Sanders <>
Tested-by: Nick Sanders <>
Reviewed-by: Marco Chen <>
Reviewed-by: Nicolas Boichat <>
Reviewed-by: Mike Frysinger <>
6 files changed