Bug 994359 - Update Bitbucket certificate fingerprint; r=edmorley

Certificate updated per
http://blog.bitbucket.org/2014/04/08/bitbuckets-ssl-certificates-are-changing/

DONTBUILD (NPOTB)

--HG--
extra : rebase_source : 7b2acdad8221d40629a0fff7b9b9fcfbd51eb1a5
extra : amend_source : 2138af8ab774420f466e33914f2abdb82a52df25