loader: fix leak of child-to-parent links on dlclose() am: 772db5e6 am: 78b10daa -s ours am: dfb42b36 am: de4e1ef7 am: 62110f95 am: cb3e51d0 am: b2792c70 am: 7ac2da92 am: f62dc07a am: ca97abb2 Change-Id: I1c41aa814ae28c24f2bff84473a4f49508c4541a