explain the trap

Author: DavidSpickett

lldb/test/API/linux/aarch64/fpmr/main.c

@@ -37,6 +37,8 @@ int main(int argc, char *argv[]) {
   uint64_t new_fpmr = get_fpmr(); // Set break point at this line.
   uint64_t expected_fpmr = ((uint64_t)0b010101 << 32) | (uint64_t)0b010;
 
+  // If the debugger failed to update the value, exit uncleanly.
+  // This also allows you to run this program standalone to create a core file.
   if (new_fpmr != expected_fpmr)
     __builtin_trap();