[libunwind][test] Add .clang-format (#209364)

Borrow from `libcxx/test/.clang-format` to avoid `clang-format`
suggestions that are incompatible with `FileCheck`.

GitOrigin-RevId: 84199dde7198eabc924e93750063a20ceef26ef2
1 file changed
tree: f3b7a2c2c6ca5ae0a14345d947fd1d97c4c5cb6a
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT