[fuzzer] Fix reload.test on Linux/aarch64

[zatrazz]

Summary

The compiler generates a 'brk' instruction for builtin_trap on
aarch64 and Linux kernel issues a SIGTRAP, different from x86
where compiler emits an ud2 for builtin_trap and Linux issue
a SIGILL.

A straightforward is to use abort instead.

[vitalybuka]

LGTM

compiler-rt/test/fuzzer/ReloadTest.cpp

 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 // Test that fuzzer we can reload artifacts with any bytes inside.
 #include <algorithm>
 #include <cstdint>
+#include <cstdlib>
 #include <numeric>
 #include <set>
-#include <stdio.h>
 
 extern "C" size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size,
                                           size_t MaxSize, unsigned int Seed) {
   std::srand(Seed);
   std::generate(Data, Data + MaxSize, std::rand);
   return MaxSize;
 }
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
   if (Size > 5000 && std::set<uint8_t>(Data, Data + Size).size() > 255 &&
       (uint8_t)std::accumulate(Data, Data + Size, uint8_t(Size)) == 0)
-    __builtin_trap();
+    abort();
   return 0;
 }