Snap for 8061476 from acd780c3c829cb8947b376d960c6e7f5d7e2288f to tm-release

Change-Id: Idc8493697c1111ffe81c1aa123a432a8f6a88af5
tree: 2280766df8be3daa6bfbd4dbf50c90d7444cfe4e
  1. libbacktrace/
  2. libunwindstack/
  3. OWNERS
  4. PREUPLOAD.cfg