add flac_debian.bb: recipe for flac
add flac_debian.bb: recipe for flac

flac now can be built from debian source code with
recipes in meta and meta-debian.

Signed-off-by: Vu Tuan Anh <f457621e721ef52912f9f61c57509dbbc662c9c0@toshiba-tsdv.com>

rofehr/meta-debian,meta-debian/meta-debian,congnt-tsdv/meta-debian,tienlee/meta-debian,tienlee/meta-debian,nghiaht-tsdv/meta-debian,wwright2/meta-debian,tienlee/meta-debian,rofehr/meta-debian,meta-debian/meta-debian,tienlee/meta-debian,wwright2/meta-debian,tienlee/meta-debian,congnt-tsdv/meta-debian,wwright2/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian,rofehr/meta-debian,nghiaht-tsdv/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,nghiaht-tsdv/meta-debian,nghiaht-tsdv/meta-debian,rofehr/meta-debian,wwright2/meta-debian,nghiaht-tsdv/meta-debian,rofehr/meta-debian,congnt-tsdv/meta-debian,tienlee/meta-debian,congnt-tsdv/meta-debian,congnt-tsdv/meta-debian,meta-debian/meta-debian,wwright2/meta-debian