[hwasan] Limit try-catch tests to aarch64.

HWASan C++ tests do not do well on x86_64.
Fixes https://bugs.llvm.org/show_bug.cgi?id=41923

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@361063 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/hwasan/TestCases/try-catch.cc b/test/hwasan/TestCases/try-catch.cc
index 68b9011..df1f93d 100644
--- a/test/hwasan/TestCases/try-catch.cc
+++ b/test/hwasan/TestCases/try-catch.cc
@@ -1,6 +1,9 @@
 // RUN: %clangxx_hwasan %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=GOOD
 // RUN: %clangxx_hwasan %s -mllvm -hwasan-instrument-landing-pads=0 -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=BAD
 
+// C++ tests on x86_64 require instrumented libc++/libstdc++.
+// REQUIRES: aarch64-target-arch
+
 #include <stdexcept>
 #include <cstdio>