Fix glib-networking libtool library's name
Fix glib-networking libtool library's name

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/514>

GStreamer/cerbero,nirbheek/cerbero,GStreamer/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero,GStreamer/cerbero