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: Ifd806d0a819f472b77f35d88f662325b8557687a