am 3c72deb3: Merge "ndk: remove undefined symbols from system headers" into gingerbread

Merge commit '3c72deb3f4f087a3f7b8915301277b9e26b286e3' into gingerbread-plus-aosp

* commit '3c72deb3f4f087a3f7b8915301277b9e26b286e3':
  ndk: remove undefined symbols from system headers