[clang] Add support for builtin_verbose_trap (PR #79230)

[David Blaikie via cfe-commits]

================
@@ -27,6 +27,9 @@ namespace llvm {
   }
 }
 
+// Prefix for __builtin_verbose_trap.
+#define CLANG_VERBOSE_TRAP_PREFIX "__llvm_verbose_trap"
----------------
dwblaikie wrote:

I think we usually use some llvm or clang prefix in these sort of things, to reduce the chance of conflict with some other implementation's reserved names? Could be worth a quick grepping for other similar symbol names in clang/llvm to see what we do/if there's some pattern to follow?

https://github.com/llvm/llvm-project/pull/79230