Snippets for ruby-gnome 4.3.8 from Fedora aarch64

Sourced from https://kojipkgs.fedoraproject.org/packages/rubygem-gstreamer/4.3.8/1.fc46/data/logs/aarch64/build.log.

• rbgst-sample.c:34:54: warning: unused parameter ‘idx’ [-Wunused-parameter]
     34 | rg_gst_combine_buffer_list(GstBuffer **buffer, guint idx, gpointer user_data)
        |                                                ~~~~~~^~~