Bug 946351: Update configure,in to require NSS 3.15.3.1, r=me, a=lsblakk

--HG--
extra : rebase_source : cab2927c62baa2bcd34d377f3a60e0731f89aec6
extra : amend_source : 9cc9a180dfe5396f159ff8166eccb0489b2cfb4b