libglnx: Pick up bugfix and backports

Need more autocleanup backports for GIO types.

diff --git a/libglnx b/libglnx
index be6bc2d75d390959f24fcc53edf3f4ddfdcddbaf..cf8ae27bab717621f1edf8ab6ae3dd89da4d8d4f 160000 (submodule)
--- a/libglnx
+++ b/libglnx
@@ -1 +1 @@
-Subproject commit be6bc2d75d390959f24fcc53edf3f4ddfdcddbaf
+Subproject commit cf8ae27bab717621f1edf8ab6ae3dd89da4d8d4f