[ASAN] Disable ManyThreadsTest in AArch64

This test was in an infinite loop in AArch64. We're investigating it
on PR24389, but I'm disabling it for now, so that we continue testing
everything else.

llvm-svn: 244316

Author: rengolin

compiler-rt/lib/asan/tests/asan_test.cc

@@ -335,6 +335,8 @@ void *ManyThreadsWorker(void *a) {
   return 0;
 }
 
+#if !defined(__aarch64__)
+// FIXME: Infinite loop in AArch64 (PR24389).
 TEST(AddressSanitizer, ManyThreadsTest) {
   const size_t kNumThreads =
       (SANITIZER_WORDSIZE == 32 || ASAN_AVOID_EXPENSIVE_TESTS) ? 30 : 1000;
@@ -346,6 +348,7 @@ TEST(AddressSanitizer, ManyThreadsTest) {
     PTHREAD_JOIN(t[i], 0);
   }
 }
+#endif
 
 TEST(AddressSanitizer, ReallocTest) {
   const int kMinElem = 5;