libunwind: Introduce __libunwind_config.h.

Introduce __libunwind_config.h to avoid cross repository circular
dependency with libcxxabi.


git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@242642 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed
tree: 5ed045f17b94250fa4eb5fdb3d0026fbfe75089e
  1. cmake/
  2. include/
  3. src/
  4. test/
  5. .arcconfig
  6. .clang-format
  7. CMakeLists.txt