[proaudio] ac3jack ebuild (to satify "one ebuild - one message" rule)

[Zlobin Nikita]

Ebuild is in older message: 
http://www.mail-archive.com/proaudio@lists.tuxfamily.org/
msg05497.html
failed to build due to some changes in 
boost, and previous patch missed some 
headers. There is newer patch, replacing 
older.