[w3c/webauthn] feb7d7: Fix linking error

  Branch: refs/heads/vgb-u2f-attestation
  Home:   https://github.com/w3c/webauthn
  Commit: feb7d7b812183a70e56e5226359b6dbc0c275b8d
      https://github.com/w3c/webauthn/commit/feb7d7b812183a70e56e5226359b6dbc0c275b8d
  Author: Vijay Bharadwaj <vijaybh@users.noreply.github.com>
  Date:   2017-02-10 (Fri, 10 Feb 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Fix linking error