[hwasan] Exclude bcmp interceptor test from Android

This fixes a buildbot breakage (e.g.,
https://lab.llvm.org/buildbot/#/builders/77/builds/31422/steps/21/logs/stdio)
that was caused by the introduction of this test
(ff1329e).

Build error from buildbot:
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/compiler-rt/test/hwasan/TestCases/bcmp.cpp:18:10: error: use of undeclared identifier 'bcmp'
   18 |   return bcmp(p, a, size);

Author: thurstond

compiler-rt/test/hwasan/TestCases/bcmp.cpp

@@ -2,6 +2,7 @@
 // RUN: %clangxx_hwasan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_hwasan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_hwasan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
+// REQUIRES: !android
 
 #include <sanitizer/hwasan_interface.h>
 #include <stdlib.h>