[Sanitizers][Test] XFAIL fuzzer-ubsan on darwin arm

This test currently fails to compile on darwin arm host (green.lab.llvm.org)

rdar://158303001

Author: Mariusz Borsa

compiler-rt/test/fuzzer/fuzzer-ubsan.test

@@ -1,3 +1,6 @@
+// This test currently fails to compile on green.lab.llvm.org (arm)
+// XFAIL: system-darwin && target=arm{{.*}}
+
 RUN: %cpp_compiler -fsanitize=undefined -fno-sanitize-recover=all %S/SignedIntOverflowTest.cpp -o %t-SignedIntOverflowTest-Ubsan
 RUN: not %run %t-SignedIntOverflowTest-Ubsan 2>&1 | FileCheck %s
 CHECK: runtime error: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'