Merge c7c7b49bc150b4a18b970d6b783c9eccab5e889f on remote branch

Change-Id: I9ea408a0644e1971fe13359ae14c5d813e7c91d3
tree: 1a8fa2d68feac248470388459167ef2e15b32103
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg