include liben50221 in tvheadend builds

Hello just installed the newest tvheadend 4.2 build from Index of /builds/addons/RPi2/service.tvheadend42/
and found that liben50221 is not enabled in those builds: "dvben50221 no"
I would suggest to enable it, since this option allows the use of hw cam 's like the one in TT S2 3650 CI
Thanks a lot
Ognian