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 Change-Id: I00d7ea4507586ceb236e21d78c4da8be380fbf78