[Darwin][UBSan][Sanitizer] abort_on_error ubsan test fix for arm64

[thetruestblue]

Summary

The current darwin abort_on_error test specifically tests for a division
by zero undefined behavior. However arm does not trap by default for this
behavior. x86 signals the abort, which is why the test passes on x86.
This patch updates the test to test for a case where the ubsan runtime
specifically calls Die() to trigger an abort by default.

rdar://92108564

[yln]

LGTM, thanks!

compiler-rt/test/sanitizer_common/TestCases/Darwin/abort_on_error.cpp

 
 // Leak detection isn't treated as an error so `abort_on_error=1` doesn't work.
 // UNSUPPORTED: lsan
 
 int global;
 
 int main() {
 #if defined(USING_ubsan)
-  int value = 5;
-  int computation = value / 0; // Division by zero.
+  volatile int *null = 0;
+  *null = 0;
 #else
   volatile int *a = new int[100];
   delete[] a;
   global = a[0]; // use-after-free: triggers ASan/TSan report.
 #endif
   return 0;
 }