[libunwind] Fix incorrect lit substitutions in tests

The LIT substitutions used in libunwind are the same as those from
libc++, and we forgot to update the libunwind tests after the libc++
substitutions started being delimited by braces.

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 6f1d558db42cf92351c649a66c00b881eb75537c
1 file changed
tree: cb7454e39e513bc828474c4d6eba394d8a1eb232
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT