am 778dc51c: Merge "Delete old NDKs."

* commit '778dc51c1d74fdf069c6773da8c96c9d090c7854':
  Delete old NDKs.
tree: fcb499ec5684c06baeb62faa56475b39dfe7f8d3
  1. current/
  2. Android.mk
  3. CleanSpec.mk