gstreamer-rtsp-server-1.0: Update from 1.15+ git master
gstreamer-rtsp-server-1.0: Update from 1.15+ git master

Fixes https://gitlab.gnome.org/GNOME/vala/issues/653

GNOME/vala,GNOME/vala,frida/vala,GNOME/vala,GNOME/vala,frida/vala,frida/vala,frida/vala,frida/vala