Merge change 3459 into donut

* changes:
  make signapk strip other signatures
tree: 563e06a904398f2b17b22de23bdb8745a55e4e31
  1. core/
  2. libs/
  3. target/
  4. tools/
  5. buildspec.mk.default
  6. cleanspec.mk
  7. envsetup.sh