Add ed25519 gem back to the omnibus install
Add ed25519 gem back to the omnibus install

This lets folks workaround not having knife by installing it back on
windows. This gets removed in 18.

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

chef/chef,MsysTechnologiesllc/chef,tas50/chef-1,tas50/chef-1,MsysTechnologiesllc/chef,MsysTechnologiesllc/chef,chef/chef,chef/chef,tas50/chef-1,gene1wood/chef,tas50/chef-1,gene1wood/chef,gene1wood/chef,chef/chef,MsysTechnologiesllc/chef,gene1wood/chef