[libunwind] [libunwind] Use consistent indentation in `__libunwind_config.h` (PR #152861)

[Heejin Ahn via cfe-commits]

================
@@ -11,6 +11,8 @@
 
 #define _LIBUNWIND_VERSION 15000
 
+// Disable clang-format as it makes the huge conditions unreadable.
+// clang-format off
----------------
aheejin wrote:

Sorry I thought this makes incorrect indentations correct..? 

https://github.com/llvm/llvm-project/pull/152861