Merge changes from topic 'am-a4406a3abc304bda91eea9becf864ba6' into nyc-mr2-dev-plus-aosp

* changes:
  dlext_namespace.h: Declare android_get_LD_LIBRARY_PATH am: 00d5dad56f
  Make dlext_namespaces.h available to users of libnativeloader am: 243bbd29d6  -s ours