xbmc: update to xbmc-14-5f031ff
ffmpeg: disable vorbis encoder
xbmc: do not depend on flac
flac: build static
Revert "remove package: lame"

This reverts commit 5aed5abff5f1590f755baede49f3fa65b9ad956b.

required by audioencoder.lame..
lame: build static
projects/Generic/options: add optional XBMC_AUDIOENCODER_ADDONS support
xbmc: build audioencoers