scudo: fix CheckFailed-related build breakage

[dvyukov]

Summary

I was running:

$ ninja check-sanitizer check-msan check-asan \

check-tsan check-lsan check-ubsan check-cfi \
check-profile check-memprof check-xray check-hwasan

but missed check-scudo...

compiler-rt/lib/scudo/scudo_termination.cpp

 void SetUserDieCallback(DieCallbackType Callback) {}
 
 void NORETURN Die() {
   if (common_flags()->abort_on_error)
     Abort();
   internal__exit(common_flags()->exitcode);
 }
 
-void SetCheckFailedCallback(CheckFailedCallbackType callback) {}
+void SetCheckUnwindCallback(void (*callback)()) {}
 
 void NORETURN CheckFailed(const char *File, int Line, const char *Condition,
                           u64 Value1, u64 Value2) {
   __scudo::dieWithMessage("CHECK failed at %s:%d %s (%lld, %lld)\n",
                           File, Line, Condition, Value1, Value2);
 }
 
 }  // namespace __sanitizer