Merge 93a6151f1dd07c095dc13e11d5b68b23e98b5e73 on remote branch

Change-Id: I590a7560a48e5a9e54e48fd23b1091b416ac80cb
tree: d019db552ce45278c3646938d87fe04ef26c9a52
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg