Snap for 5533229 from f40a7400349114c08ab5a635a31ddd5b9673719f to qt-release

Change-Id: Ia2b4d2951ac65d8bb30becde4140acfd2372e5e7
tree: 8f43b4b0eea63ec7fa2b609985c8c4874efcc000
  1. libbacktrace/
  2. libunwindstack/