Add package libbs2b

The libbs2b.mk file was incorrectly added in 262aa647f04db4aac. Sorry about
that.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
ffmpeg: update

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
libbluray: update

Signed-off-by: Timothy Gu <timothygu99@gmail.com>