Drop nss321 backport, do an NSS/BoringSSL "chimera build" instead
    
    * Thu Jan 14 2016 Kevin Kofler <Kevin@tigcc.ticalc.org> - 5.6.0-0.13.beta
    - Drop nss321 backport (and the related nss-headers patch), it did not help
    - Do an NSS/BoringSSL "chimera build" as will be the default in Chromium 47
    - Update License accordingly (add "OpenSSL")
    - Fix the "chimera build" to call EnsureNSSHttpIOInit (backport from Chromium)