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

Change-Id: Id90e8ed17cdd2804d6f6534cfbbb70e1892be0cd