component/firewalld: fix the rpath of pygobject3

This is a fixup of 61c13f54.

component/firewalld/buildout.cfg

@@ -109,6 +109,7 @@ make-binary = ${ninja:location}/bin/ninja -C builddir
 environment =
   PATH=${pkgconfig:location}/bin:${ninja:location}/bin:${libtool:location}/bin:${glib:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${glib:location}/lib/pkgconfig:${glib:pkg_config_depends}:${gobject-introspection:location}/lib/pkgconfig
+  LDFLAGS=-Wl,-rpath=${gobject-introspection:location}/lib -Wl,-rpath=${libffi:location}/lib -Wl,-rpath=${glib:location}/lib
   PYTHON=${buildout:executable}
 
 [trusted-config]