Merge changes I76e5ebd8,I8e47acb1

* changes:
  authfs: Add MerkleLeaves for integrity bookkeeping
  authfs: Replace a trait bound const w/ a simple const
tree: 07bb5c75848e230d9be6a6ba0eb250f6438dffd6
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. virtmanager/
  7. .clang-format
  8. PREUPLOAD.cfg