8257396: AArch64 Zero build is broken after JDK-8252684

Reviewed-by: dholmes

Author: shipilev

test/hotspot/gtest/aarch64/test_assembler_aarch64.cpp

@@ -24,7 +24,7 @@
 
 #include "precompiled.hpp"
 
-#ifdef AARCH64
+#if defined(AARCH64) && !defined(ZERO)
 
 #include "asm/assembler.hpp"
 #include "asm/assembler.inline.hpp"