Merge changes I364f45f2,Idddbc7ec

* changes:
  Remove the slicing tool.
  clang-format for frameworks/ml/nn
tree: 1b89354e61934ad1a2dc073e8c0f8e6c63426f83
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg