[w3c/webauthn] db1be8: Fix Android attestation (#546)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: db1be8059b02cb8981fbe0229f6d1eebaedb9505
      https://github.com/w3c/webauthn/commit/db1be8059b02cb8981fbe0229f6d1eebaedb9505
  Author: christiaanbrand <christiaan@entersekt.com>
  Date:   2017-09-13 (Wed, 13 Sep 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Fix Android attestation (#546)

* Fix Android attestation

Android attestation had a circular dependency on the public key: The authenticatorData has a public key that was originally intended to be stuck in the ChallengeData for generating a new keypair. When calling this function the public key isn't available to us yet. We have made a change to bring this in line with other attestation formats (ie. packed attestation).

* Update index.bs

* Update index.bs