gnome3.gnome-music: disable strictDeps

With strictDeps, wrapGAppsHook in nativeBuildInputs does not seem to propagate librsvg, leading to the folowing warning:

(org.gnome.Music:23143): Gtk-WARNING **: 03:04:24.030: Could not load a pixbuf from /org/gtk/libgtk/theme/Adwaita/assets/bullet-symbolic.svg.
This may indicate that pixbuf loaders or the mime database could not be found.