loader: fix leak of child-to-parent links on dlclose() am: 772db5e6d4 am: 78b10daab3  -s ours am: dfb42b364d am: de4e1ef729 am: 62110f9538 am: cb3e51d006 am: b2792c701f am: 7ac2da9266 am: f62dc07af3
am: ca97abb2fb

Change-Id: I1c41aa814ae28c24f2bff84473a4f49508c4541a