Updated gbp configuration for new branch.
Updated gbp configuration for new branch.

spreedbox-packaging/spreed-webrtc-debian,spreedbox-packaging/spreed-webrtc-debian,spreedbox-packaging/spreed-webrtc-debian,spreedbox-packaging/spreed-webrtc-debian,spreedbox-packaging/spreed-webrtc-debian,spreedbox-packaging/spreed-webrtc-debian