Create the BUILD.gn file for libunwindstack

Note that the target still doesn't compile because the patches aren't
applied to fix use of NDK>20 APIs.

Bug: 991960
Change-Id: Ib58645a74ef9b882d2c95860e2642155d1a05ccf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/third_party/libunwindstack/+/1865542
Reviewed-by: Mike Wittman <wittman@chromium.org>
1 file changed
tree: b220991203c906acddc2302d5ce784134ba4aa48
  1. src/
  2. tools/
  3. .clang-format
  4. BUILD.gn
  5. LICENSE
  6. OWNERS
  7. README.chromium