DWARF: convert error logs to _LIBUNWIND_LOG

Use the `_LIBUNWIND_LOG` macro instead of the explicit `fprintf` call.
NFC.

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@292721 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed
tree: d7e44980d2660ee227697cae3c14f6e63d8efe57
  1. cmake/
  2. include/
  3. src/
  4. test/
  5. .arcconfig
  6. .clang-format
  7. CMakeLists.txt