am b71f63bc: Merge "GC step 2. Finding garbage bigram entries."

* commit 'b71f63bc1c69e3a6b716790880cf3d8e8771f51d':
  GC step 2. Finding garbage bigram entries.
tree: 48f42cb1dbac2bcf78c7ff5215bf8a223ddc4c67
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk