Merge changes from topic \'native_unloads\' into nyc-dev
am: ab249381b4

* commit 'ab249381b4757e96da31c0cdcaf889861d1cc928':
  Fix libarttest to be non debug
  Change test 136 to use dlopen
  Revert "Revert "Remove double unloading hack""
  Revert "Revert "Revert "Revert "(dl)Close native libraries on unload""""

Change-Id: Ibb1c01ad6ce97f086c29897961953e844d1eea76