[libunwind] Allow specifying custom Lit config files

This is the libunwind counterpart of 0c66af970c80.

GitOrigin-RevId: c55051eea5d3cd57abfd9727f519b670517704d9
5 files changed
tree: a724ff851cdcb19a83237de687c6942eb04f0756
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT