Merge tag android-5.1.0_r1 into AOSP_5.1_MERGE

Change-Id: I28d8fd55525865d7f435f86ae5af7b13bedefac2
tree: 776516a7af23786b4cceaa1267b410b4ccb3329f
  1. android/
  2. dist/
  3. CleanSpec.mk