merge from open-source master

Change-Id: Iea0b0b45f13a3f1d045ed36d475dba5bbed71874
tree: 8df8c4853c447283df0a6781c0e01112addafa67
  1. Tremolo/
  2. Android.mk
  3. CleanSpec.mk
  4. MODULE_LICENSE_BSD_LIKE
  5. NOTICE
  6. README