Update of LibJitsi (the SSRC are the same before and after the stream start,
see commit 327a863e4a5023f5b2b21c376f6008985be770c3 and
fa7d7fc2fbc8087c178ba53bf2ca6f92aba0e380 of libjitsi).

And now the video is correctly displayed in the Jitsi Meet conference \o/