am f581c1ea: Unbundle libstlport with NDK r4.

Merge commit 'f581c1eaf398e25de8ecae69c46c698604b288f0' into gingerbread

* commit 'f581c1eaf398e25de8ecae69c46c698604b288f0':
  Unbundle libstlport with NDK r4.