ffmpeg: Update to 2.3.3 and 1.2.8.

This includes security fixes for.

2.3.3:

CVE-2014-5271 60bfa9154d0084bc8b007b984051a6bb82d9652c  /
52b81ff4635c077b2bc8b8d3637d933b6629d803

1.2.8:

CVE-2014-5272, abc1fa7c5a1dca1345b9471b81cfcda00c56220d / 3539d6c63a16e1b2874bb037a86f317449c58770
(CVE-2014-5271, 18342848f7fa0c98f81049495adaf3d528b325f5 / 52b81ff4635c077b2bc8b8d3637d933b6629d803)