[fuzzer][test] Disable noasan-strncmp test for AArch64

This test fails on several aarch64 bots
  clang-aarch64-lld-2stage ( https://lab.llvm.org/buildbot/#/builders/185/builds/3525 )
  clang-aarch64-full-2stage ( https://lab.llvm.org/buildbot/#/builders/179/builds/5904 )
  clang-aarch64-sve-vla ( https://lab.llvm.org/buildbot/#/builders/197/builds/4519 )
Disable it while this is analyzed.

Reviewed By: DavidSpickett

Differential Revision: https://reviews.llvm.org/D148332

compiler-rt/test/fuzzer/noasan-strncmp.test

@@ -1,4 +1,4 @@
-UNSUPPORTED: darwin, target={{.*(freebsd|windows).*}}
+UNSUPPORTED: darwin, target={{.*(freebsd|windows).*}}, target=aarch64{{.*}}
 
 RUN: %cpp_compiler -fno-sanitize=address %S/StrncmpTest.cpp -o %t-NoAsanStrncmpTest
 RUN: not %run %t-NoAsanStrncmpTest -seed=2 -runs=10000000   2>&1 | FileCheck %s